Seagate Camcorder ST3146807FC User Guide

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Cheetah 10K.6 FC Disc Drive  
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ST3146807FC  
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ST373307FC  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ST336607FC  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Product Manual, Volume 1  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
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Cheetah 10K.6 FC Disc Drive  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ST3146807FC  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ST373307FC  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
ST336607FC  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
Product Manual, Volume 1  
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  
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© 2002 Seagate Technology LLC All rights reserved  
June 2002  
Publication number: 100195490, Rev. B  
Seagate, Seagate Technology, and the Seagate logo are registered trademarks of Seagate Technology LLC.  
Cheetah, SeaFAX, SeaFONE, SeaBOARD, and SeaTDD are either registered trademarks or trademarks of  
Seagate Technology LLC. Other product names are registered trademarks or trademarks of their owners.  
Seagate reserves the right to change, without notice, product offerings or specifications. No part of this publica-  
tion may be reproduced in any form without written permission of Seagate Technology LLC.  
Printed in the United States of America  
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Revision status summary sheet  
Revision  
Date  
Writer/Engineer  
Sheets Affected  
A
B
06/18/2002  
06/26/2002  
K. Schweiss/B. Hohn  
K. Schweiss/B. Hohn  
1/1, v-viii, 1-72  
19  
Notice.  
Product Manual 100195490 is Volume 1 of a two volume document with the Fibre Channel Interface  
information in the Fibre Channel Interface Manual, part number 77767496.  
If you need the Fibre Channel Interface information, order the Fibre Channel Interface Manual, part  
number 77767496.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
v
Contents  
6.3.3  
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vi  
Cheetah 10K.6 FC Product Manual, Rev. B  
10.0  
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Cheetah 10K.6 FC Product Manual, Rev. B  
vii  
List of Figures  
Figure 25.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
1
1.0  
Scope  
This manual describes Seagate Technology® LLC, Cheetah® 10K.6 FC (Fibre Channel) disc drives.  
Cheetah 10K.6 FC drives support the Fibre Channel Arbitrated Loop and SCSI Fibre Channel Protocol specifi-  
cations to the extent described in this manual. The Fibre Channel Interface Manual (part number 77767496)  
describes the general Fibre Channel Arbitrated Loop characteristics of this and other Seagate Fibre Channel  
drives.  
Figure 1.  
Cheetah 10K.6 FC family disc drive  
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2
Cheetah 10K.6 FC Product Manual, Rev. B  
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Cheetah 10K.6 FC Product Manual, Rev. B  
3
2.0  
Applicable standards and reference documentation  
The drive has been developed as a system peripheral to the highest standards of design and construction. The  
drive depends upon its host equipment to provide adequate power and environment in order to achieve opti-  
mum performance and compliance with applicable industry and governmental regulations. Special attention  
must be given in the areas of safety, power distribution, shielding, audible noise control, and temperature regu-  
lation. In particular, the drive must be securely mounted in order to guarantee the specified performance char-  
acteristics. Mounting by bottom holes must meet the requirements of Section 8.5.  
2.1  
Standards  
The Cheetah 10K.6 FC family complies with Seagate standards as noted in the appropriate sections of this  
manual and the Seagate Fibre Channel Interface Manual, part number 77767496.  
The Cheetah 10K.6 FC disc drive is a UL recognized component per UL1950, CSA certified to CAN/CSA  
C22.2 No. 950-95, and VDE certified to VDE 0805 and EN60950.  
2.1.1  
Electromagnetic compatibility  
The drive, as delivered, is designed for system integration and installation into a suitable enclosure prior to use.  
As such the drive is supplied as a subassembly and is not subject to Subpart B of Part 15 of the FCC Rules  
and Regulations nor the Radio Interference Regulations of the Canadian Department of Communications.  
The design characteristics of the drive serve to minimize radiation when installed in an enclosure that provides  
reasonable shielding. As such, the drive is capable of meeting the Class B limits of the FCC Rules and Regula-  
tions of the Canadian Department of Communications when properly packaged. However, it is the user’s  
responsibility to assure that the drive meets the appropriate EMI requirements in their system. Shielded I/O  
cables may be required if the enclosure does not provide adequate shielding. If the I/O cables are external to  
the enclosure, shielded cables should be used, with the shields grounded to the enclosure and to the host con-  
troller.  
2.1.1.1  
Electromagnetic susceptibility  
As a component assembly, the drive is not required to meet any susceptibility performance requirements. It is  
the responsibility of those integrating the drive within their systems to perform those tests required and design  
their system to ensure that equipment operating in the same system as the drive or external to the system  
does not adversely affect the performance of the drive. See Section 5.1.1 and Table 1, DC power requirements.  
2.1.2  
Electromagnetic compliance  
Seagate uses an independent laboratory to confirm compliance with the directives/standards for CE Marking  
and C-Tick Marking. The drive was tested in a representative system for typical applications. The selected sys-  
tem represents the most popular characteristics for test platforms. The system configurations include:  
Typical current use microprocessor  
• 3.5-inch floppy disc drive  
• Keyboard  
• Monitor/display  
• Printer  
• External modem  
• Mouse  
Although the test system with this Seagate model complies with the directives/standards, we cannot guarantee  
that all systems will comply. The computer manufacturer or system integrator shall confirm EMC compliance  
and provide the appropriate marking for their product.  
Electromagnetic compliance for the European Union  
If this model has the CE Marking it complies with the European Union requirements of the Electromagnetic  
Compatibility Directive 89/336/EEC of 03 May 1989 as amended by Directive 92/31/EEC of 28 April 1992 and  
Directive 93/68/EEC of 22 July 1993.  
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4
Cheetah 10K.6 FC Product Manual, Rev. B  
Australian C-Tick  
If this model has the C-Tick Marking it complies with the Australia/New Zealand Standard AS/NZS3548 1995  
and meets the Electromagnetic Compatibility (EMC) Framework requirements of Australia’s Spectrum Man-  
agement Agency (SMA).  
Korean MIC  
If this model has the Korean Ministry of Information and Communication (MIC) logo, it complies with paragraph  
1 of Article 11 of the Electromagnetic Compatibility (EMC) Control Regulation and meets the Electromagnetic  
Compatibility Framework requirements of the Radio Research Laboratory (RRL) Ministry of Information and  
Communication Republic of Korea.  
Taiwanese BSMI  
If this model has two Chinese words meaning “EMC certification” followed by an eight digit identification num-  
ber, as a Marking, it complies with Chinese National Standard (CNS) 13438 and meets the Electromagnetic  
Compatibility (EMC) Framework requirements of the Taiwanese Bureau of Standards, Metrology, and Inspec-  
tion (BSMI).  
2.2  
Reference documents  
Cheetah 10K.6 FC Installation Guide  
Seagate part number: 100195492  
Fibre Channel Interface Manual  
Seagate part number: 77767496  
ANSI Fibre Channel Documents  
X3.230-1994  
X3.297.1997  
X3.303.1998  
X3.272-1996  
X3.269-1996  
NCITS TR-19  
NCITS TR-20  
SFF-8045  
FC Physical and Signaling Interface (FC-PH)  
FC-PH-2 Fibre Channel Physical and Signaling Interface-2  
FC-PH-3 Fibre Channel Physical and Signaling Interface-3  
FC Arbitrated Loop (FC-AL)  
Fibre Channel Protocol for SCSI (FCP)  
Private Loop SCSI Direct Attach (PLDA)  
Fabric Loop Attachment (FC-FLA)  
Specification for 40-pin SCA-2 Connector with Parallel Selection  
Specification for 40-pin SCA-2 Connector with Bidirectional Enclosure Services  
Interface  
SFF-8067  
ANSI Small Computer System Interface (SCSI) Documents  
X3.131-1994  
X3.270-1996  
(SCSI-2)  
(SCSI-3) Architecture Model  
NCITS 305-199X (SCSI-3) Enclosure Services  
Specification for Acoustic Test Requirement and Procedures  
Seagate part number: 30553-001  
Package Test Specification  
Package Test Specification  
Seagate P/N 30190-001 (under 100 lb.)  
Seagate P/N 30191-001 (over 100 lb.)  
In case of conflict between this document and any referenced document, this document takes precedence.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
5
3.0  
General description  
Cheetah 10K.6 FC drives combine giant magnetoresistive (GMR) heads, partial response/maximum likelihood  
(PRML) read channel electronics, embedded servo technology, and a Fibre Channel interface to provide high  
performance, high capacity data storage for a variety of systems including engineering workstations, network  
servers, mainframes, and supercomputers.  
Cheetah 10K.6 FC drives are random access storage devices designed to support the Fibre Channel Arbi-  
trated Loop (FC-AL) and SCSI Fibre Channel Protocol as described in the ANSI specifications, this document,  
and the Fibre Channel Interface Manual (part number 77767496) which describes the general interface char-  
acteristics of this drive. Cheetah 10K.6 FC drives are classified as intelligent peripherals and provide level 2  
conformance (highest level) with the ANSI SCSI standard.  
See Figure 2 for an exploded view of the drive. Never disassemble the HDA. This exploded view is for informa-  
tion only. Do not attempt to service items in the sealed enclosure (heads, media, actuator, etc.) as this requires  
special facilities. The drive contains no parts replaceable by the user and opening the HDA for any reason  
voids your warranty.  
Figure 2.  
Cheetah 10K.6 FC disc drive  
Cheetah 10K.6 FC drives use a dedicated landing zone at the innermost radius of the media to eliminate the  
possibility of destroying or degrading data by landing in the data zone. The heads automatically go to the land-  
ing zone when power is removed from the drive.  
An automatic shipping lock prevents potential damage to the heads and discs that results from movement dur-  
ing shipping and handling. The shipping lock disengages and the head load process begins when power is  
applied to the drive.  
Cheetah 10K.6 FC drives decode track 0 location data from the servo data embedded on each surface to elim-  
inate mechanical transducer adjustments and related reliability concerns.  
The drives also use a high-performance actuator assembly with a low-inertia, balanced, patented, straight arm  
design that provides excellent performance with minimal power dissipation.  
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6
Cheetah 10K.6 FC Product Manual, Rev. B  
3.1  
Standard features  
Cheetah 10K.6 FC drives have the following standard features:  
• Integrated dual port FC-AL controller  
• Concurrent dual port transfers  
• Support for FC arbitrated loop, private and public attachment  
• Differential copper FC drivers and receivers  
• Downloadable firmware using the FC-AL interface  
• Supports SCSI enclosure services via interface connector  
• 128-deep task set (queue)  
• Supports up to 32 initiators  
• Drive selection ID and configuration options are set on the FC-AL backpanel or through interface com-  
mands. Jumpers are not used on the drive.  
• Fibre Channel worldwide name uniquely identifies the drive and each port  
• User-selectable logical block size (512 to 528 bytes per logical block) in even numbers of blocks  
• Selectable frame sizes from 256 to 2,112 bytes  
• Industry standard 3.5-inch low profile form factor dimensions  
• Programmable logical block reallocation scheme  
• Flawed logical block reallocation at format time  
• Programmable auto write and read reallocation  
• Reed-Solomon error correction code  
• Sealed head and disc assembly (HDA)  
• No preventive maintenance or adjustments required  
• Dedicated head landing zone  
• Automatic shipping lock  
• Embedded Grey Code track address and servo wedge address to eliminate seek errors  
• Self-diagnostics performed at power on  
• 1:1 interleave  
• Zone bit recording (ZBR)  
• Vertical, horizontal, or top down mounting  
• Dynamic spindle brake  
• 8,192 Kbyte data buffer. See Section 4.5.  
• Embedded servo design  
• Reallocation of defects on command (Post Format)  
• Fibre Channel interface transports SCSI protocol  
3.2  
Media description  
The media used on the drive has a diameter of approximately 84 mm (approximately 3.3 inches). The alumi-  
num substrate is coated with a thin film magnetic material, overcoated with a proprietary protective layer for  
improved durability and environmental protection.  
3.3  
Performance  
• Programmable multi-segmentable cache buffer  
• 200 Mbytes/sec maximum instantaneous data transfers per port  
• 10K RPM spindle; average latency = 2.99 msec  
• Command queuing of up to 128 commands  
• Background processing of queue  
• Supports start and stop commands  
• Adaptive seek velocity; improved seek performance  
3.4  
Reliability  
• 1,200,000 hour MTBF  
• LSI circuitry  
• Balanced low mass rotary voice coil actuator  
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Cheetah 10K.6 FC Product Manual, Rev. B  
7
• Self-Monitoring Analysis and Reporting Technology (S.M.A.R.T.)  
• Dithering  
3.5  
Unformatted and formatted capacities  
Formatted capacity depends on the spare reallocation sectors scheme selected, the number of data tracks per  
sparing zone, and the number of alternate sectors (LBAs) per sparing zone. The following table shows the  
standard OEM model capacity:  
Formatted  
Unformatted  
ST3146807FC  
ST373307FC  
ST336607FC  
11177330h (146.8) Gbytes (190.0) Gbytes  
88BB998h (73.3) Gbytes  
445DCCCh (36.7) Gbytes  
(95.0) Gbytes  
(47.5) Gbytes  
Standard OEM models are formatted to 512 bytes per block. You can order other capacities by requesting a dif-  
ferent sparing scheme and logical block size.  
The sector size is selectable at format time. Users having the necessary equipment may modify the data block  
size before issuing a format command and obtain different formatted capacities than those listed. Cheetah  
10K.6 FC drives use a zone sparing scheme. The drive is divided into frequency zones with a variable number  
of spares in each zone.  
Note. For 2 gigabit operation, sector sizes must be divisible by 8.  
3.6  
Programmable drive capacity  
Using the Mode Select command, the drive can change its capacity to something less than maximum. See the  
Mode Select (6) parameter list table in the Fibre Channel Interface Manual, part number 7767496. A value of  
zero in the Number of Blocks field indicates that the drive will not change the capacity it is currently formatted  
to have. A number other than zero and less than the maximum number of LBAs in the Number of Blocks field  
changes the total drive capacity to the value in the Number of Blocks field. A value greater than the maximum  
number of LBAs is rounded down to the maximum capacity.  
3.7  
OEM standard drives are shipped with the Cheetah 10K.6 FC Installation Guide (part number 100195492).  
3.8 Factory-installed options  
Factory-installed accessories  
You may order the following items which are incorporated at the manufacturing facility during production or  
packaged before shipping. Some of the options available are (not an exhaustive list of possible options):  
• Other capacities can be ordered depending on sparing scheme and sector size requested.  
• Single-unit shipping pack. The drive is normally shipped in bulk packaging to provide maximum protection  
against transit damage. Units shipped individually require additional protection as provided by the single unit  
shipping pack. Users planning single unit distribution should specify this option.  
• The Cheetah 10K.6 FC Installation Guide, part number 100195492, is usually included with each standard  
OEM drive shipped, but extra copies may be ordered.  
• The Safety and Regulatory Agency Specifications, part number 75789512, is usually included with each  
standard OEM drive shipped, but extra copies may be ordered.  
3.9  
User-installed accessories  
The following accessories are available. All kits may be installed in the field.  
• Evaluation kit, part number 73473641.  
This kit provides an adapter card (“T-card”) to allow cable connections for two FC ports and DC power.  
• Single-unit shipping pack.  
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8
Cheetah 10K.6 FC Product Manual, Rev. B  
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Cheetah 10K.6 FC Product Manual, Rev. B  
9
4.0  
Performance characteristics  
This section provides detailed information concerning performance-related characteristics and features of  
Cheetah 10K.6 FC drives.  
4.1  
Internal drive characteristics  
ST3146807FC...........ST373307FC..........ST336607FC  
Drive capacity  
Read/write data heads  
Bytes per track  
146.8.........................73.3 ........................36.7........... Gbytes (formatted, rounded off value)  
8................................4 .............................2  
368............................368 .........................368............ Kbytes (average, rounded off values)  
1,835.........................1,835 ......................1,835......... Mbytes (unformatted, rounded off value)  
Bytes per surface  
Tracks per surface (total) 49,855.......................49,855 ....................49,855....... Tracks (user accessible)  
Tracks per inch  
64,000.......................64,000 ....................64,000....... TPI  
Peak bits per inch  
Internal data rate  
Disc rotation speed  
Avg rotational latency  
570............................570 .........................570............ KBPI  
475-841.....................475-841 ..................475-841..... Mbits/sec (variable with zone)  
10,008.......................10,008 ....................10,008....... rpm (+ 0.5%)  
2.99...........................2.99 ........................2.99........... msec  
4.2  
Seek performance characteristics  
Access time  
4.2.1  
Including controller  
Not including controller  
overhead 1,2 (msec)  
1 2  
,
overhead  
(msec)  
Read  
Write  
Read  
Write  
3 4  
,
Average  
Typical  
4.90  
0.55  
9.20  
5.50  
0.75  
9.70  
4.70  
0.35  
9.00  
5.30  
0.55  
9.50  
Single track Typical3,4  
Full stroke  
Typical3,4  
1.  
2.  
3.  
Execution time measured from receipt of the FCP Command to the FCP Response.  
Assumes no errors and no sector has been relocated.  
Typical access times are measured under nominal conditions of temperature, voltage, and hor-  
izontal orientation as measured on a representative sample of drives.  
Access time = controller overhead + average seek time.  
4.  
Access to data = controller overhead + average seek time + latency time.  
4.2.2  
Format command execution time (in minutes)  
ST3146807FC  
ST373307FC  
ST336607FC  
Maximum (with verify)  
180  
90  
90  
45  
45  
30  
Maximum (without verify)  
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10  
Cheetah 10K.6 FC Product Manual, Rev. B  
4.2.3  
General performance characteristics  
Minimum sector interleave  
1 to 1  
Data buffer to/from disc media (one 512-byte logical block)*  
Minimum  
Average  
Maximum  
59 MBytes/sec  
94 MBytes/sec  
105 MBytes/sec  
Fibre Channel Interface maximum instantaneous transfer rate  
1 GHz  
2 GHz  
106 Mbytes/sec* per 212 Mbytes/sec* per  
port (dual port = 212 port (dual port = 424  
Mbytes/sec*)  
Mbytes/sec*)  
Logical block sizes  
Default is 512-byte data blocks  
Variable 512 to 528 bytes per sector in even number of bytes per sector. If  
n (number of bytes per sector) is odd, then n-1 will be used.  
Read/write consecutive sectors on a track  
Yes  
Flaw reallocation performance impact (for flaws reallocated at format time  
using the spare sectors per sparing zone reallocation scheme.)  
Negligible  
0.8 msec  
Overhead time for head switch in sequential mode  
Overhead time for one track cylinder switch in sequential mode  
Average rotational latency  
1.2 msec (typical)  
2.99 msec  
*Assumes no errors and no relocated logical blocks. Rate measured from the start of the first logical block transfer to or  
from the host.  
4.3  
Start/stop time  
If the Motor Start option is disabled, the drive becomes ready within 20 seconds after DC power is applied. If a  
recoverable error condition is detected during the start sequence, the drive executes a recovery procedure and  
the time to become ready may exceed 30 seconds. Stop time is less than 30 seconds (maximum) from removal  
of DC power.  
If the Motor Start option is enabled, the internal controller accepts the commands listed in the Fibre Channel  
Interface Manual less than 3 seconds after DC power has been applied. After the Motor Start command has  
been received, the drive becomes ready for normal operations within 20 seconds (excluding the error recovery  
procedure). The Motor Start command can also be used to command the drive to stop the spindle.  
There is no power control switch on the drive.  
4.4  
Prefetch/multi-segmented cache control  
The drive provides a prefetch (read look-ahead) and multi-segmented cache control algorithms that in many  
cases can enhance system performance. Cache refers to the drive buffer storage space when it is used in  
cache operations. To select this feature, the host sends the Mode Select command with the proper values in  
the applicable bytes in page 08h. Prefetch and cache operations are independent features from the standpoint  
that each is enabled and disabled independently using the Mode Select command; however, in actual opera-  
tion, the prefetch feature overlaps cache operation somewhat as described in sections 4.5.1 and 4.5.2.  
All default cache and prefetch mode parameter values (Mode Page 08h) for standard OEM versions of this  
drive family are given in Table 15.  
4.5  
Cache operation  
Note. Refer to the Fibre Channel Interface Manual for more detail concerning the cache bits.  
Of the 8,192 kbytes physical buffer space in the drive, 6,877 kbytes can be used as a cache.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
11  
The buffer can be divided into logical segments (using Mode Select Page 08h, byte 13) from which data is read  
and to which data is written.  
The drive keeps track of the logical block addresses of the data stored in each segment of the buffer. If the  
cache is enabled (see RCD bit in the Fibre Channel Interface Manual), data requested by the host with a read  
command is retrieved from the buffer, if possible, before any disc access is initiated. If cache operation is not  
enabled, the buffer (still segmented with the required number of segments) is still used, but only as circular  
buffer segments during disc medium read operations (disregarding Prefetch operation for the moment). That is,  
the drive does not check in the buffer segments for the requested read data, but goes directly to the medium to  
retrieve it. The retrieved data merely passes through some buffer segment on the way to the host. On a cache  
miss, all data transfers to the host are in accordance with buffer-full ratio rules. On a cache hit, the drive ignores  
the buffer-full ratio rules. See the explanation provided with the information about Mode Page 02h (disconnect/  
reconnect control) in the Fibre Channel Interface Manual.  
The following is a simplified description of the prefetch/cache operation:  
Case A—read command is received and the first logical block is already in the cache:  
1. Drive transfers to the initiator the first logical block requested plus all subsequent contiguous logical blocks  
that are already in the cache. This data may be in multiple segments.  
2. When a requested logical block is reached that is not in any cache segment, the drive fetches it and any  
remaining requested logical block addresses from the disc and puts them in a segment of the cache. The  
drive transfers the remaining requested logical blocks from the cache to the host in accordance with the  
Mode Select Disconnect/Reconnect parameters, page 02h.  
3. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.  
Case B—A Read command requests data, and the first logical block is not in any segment of the cache:  
1. The drive fetches the requested logical blocks from the disc and transfers them into a segment, and then  
from there to the host in accordance with the Mode Select Disconnect/Reconnect parameters, page 02h.  
2. If the prefetch feature is enabled, refer to section 4.5.2 for operation from this point.  
During a prefetch, the drive crosses a cylinder boundary to fetch data only if the Discontinuity (DISC) bit is set  
to 1 in bit 4 of byte 2 of the Mode Select parameters page 08h. Default is zero for bit 4.  
Each cache segment is actually a self-contained circular buffer whose length is an integer number of logical  
blocks. The wrap-around capability of the individual segments greatly enhances the cache’s overall perfor-  
mance, allowing a wide range of user-selectable configurations. The drive supports operation of any integer  
number of segments from 1 to 32. Divide the 6,877 Kbytes in the buffer by the number of segments to get the  
segment size in bytes; then divide by the sector size to get the number of sectors per segment, any partial sec-  
tors remaining are not used. Default is 3 segments.  
Note. The size of each segment is not reported by Mode Sense command page 08h, bytes 14 and 15. The  
value 0XFFFF is always reported regardless of the actual size of the segment. Sending a size specifi-  
cation using the Mode Select command (bytes 14 and 15) does not set up a new segment size. If the  
STRICT bit in Mode page 00h (byte 2, bit 1) is set to one, the drive responds as it does for any attempt  
to change an unchangeable parameter.  
4.5.1  
Caching write data  
Write caching is a write operation by the drive that makes use of a drive buffer storage area where the data to  
be written to the medium is stored while the drive performs the Write command.  
If read caching is enabled (RCD=0), then data written to the medium is retained in the cache to be made avail-  
able for future read cache hits. The same buffer space and segmentation is used as set up for read functions.  
The buffer segmentation scheme is set up or changed independently, having nothing to do with the state of  
RCD. When a write command is issued, if RCD=0, the cache is first checked to see if any logical blocks that  
are to be written are already stored in the cache from a previous read or write command. If there are, the  
respective cache segments are cleared. The new data is cached for subsequent Read commands.  
If the number of write data logical blocks exceed the size of the segment being written into, when the end of the  
segment is reached, the data is written into the beginning of the same cache segment, overwriting the data that  
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Cheetah 10K.6 FC Product Manual, Rev. B  
was written there at the beginning of the operation; however, the drive does not overwrite data that has not yet  
been written to the medium.  
If write caching is enabled (WCE=1), then the drive may return Good status on a write command after the data  
has been transferred into the cache, but before the data has been written to the medium. If an error occurs  
while writing the data to the medium, and Good status has already been returned, a deferred error will be gen-  
erated.  
The Synchronize Cache command may be used to force the drive to write all cached write data to the medium.  
Upon completion of a Synchronize Cache command, all data received from previous write commands will have  
been written to the medium.  
Table 15 shows the mode default settings for the drive.  
4.5.2  
Prefetch operation  
If the Prefetch feature is enabled, data in contiguous logical blocks on the disc immediately beyond that which  
was requested by a Read command are retrieved and stored in the buffer for immediate transfer from the buffer  
to the host on subsequent Read commands that request those logical blocks (this is true even if cache opera-  
tion is disabled). Though the prefetch operation uses the buffer as a cache, finding the requested data in the  
buffer is a prefetch hit, not a cache operation hit.  
To enable Prefetch, use Mode Select page 08h, byte 12, bit 5 (Disable Read Ahead - DRA bit). DRA bit = 0  
enables prefetch.  
Since data that is prefetched replaces data already in some buffer segments, the host can limit the amount of  
prefetch data to optimize system performance. The Max Prefetch field (bytes 8 and 9) limits the amount of  
prefetch. The drive does not use the Prefetch Ceiling field (bytes 10 and 11).  
During a prefetch operation, the drive crosses a cylinder boundary to fetch more data only if Mode parameters  
page 08h, byte 2, bit 4 is set to 1 (Discontinuity--DISC bit).  
When prefetch (read look-ahead) is enabled (enabled by DRA = 0), it operates under the control of ARLA  
(Adaptive Read Look-Ahead). If the host uses software interleave, ARLA enables prefetch of contiguous blocks  
from the disc when it senses that a prefetch hit will likely occur, even if two consecutive read operations were  
not for physically contiguous blocks of data (e.g. “software interleave”). ARLA disables prefetch when it decides  
that a prefetch hit will not likely occur. If the host is not using software interleave, and if two sequential read  
operations are not for contiguous blocks of data, ARLA disables prefetch, but as long as sequential read oper-  
ations request contiguous blocks of data, ARLA keeps prefetch enabled.  
4.5.3  
Optimizing cache performance for desktop and server applications  
Desktop and server applications require different drive caching operations for optimal performance. This  
means it is difficult to provide a single configuration that meets both of these needs. In a desktop environment,  
you want to configure the cache to respond quickly to repetitive accesses of multiple small segments of data  
without taking the time to “look ahead” to the next contiguous segments of data. In a server environment, you  
want to configure the cache to provide large volumes of sequential data in a non-repetitive manner. In this  
case, the ability of the cache to “look ahead” to the next contiguous segments of sequential data is a good  
thing.  
The Performance Mode (PM) bit controls the way the drive switches the cache buffer into different modes of  
segmentation. In “server mode” (PM bit = 0), the drive can dynamically change the number of cache buffer seg-  
ments as needed to optimize the performance, based on the command stream from the host. In “desktop  
mode” (PM bit = 1), the number of segments is maintained at the value defined in Mode Page 8, Byte 13, at all  
times. For additional information about the PM bit, refer to the Unit Attention Parameters page (00h) of the  
Mode Sense command (1Ah) in the Fibre Channel Interface Product Manual, part number 77767496.  
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13  
5.0  
Reliability specifications  
The following reliability specifications assume correct host and drive operational interface, including all inter-  
face timings, power supply voltages, environmental requirements and drive mounting constraints  
Less than 10 errors in 108 seeks  
Seek error rate  
Read Error Rates1  
Recovered Data  
Less than 10 errors in 1012 bits transferred (OEM default settings)  
Less than 1 sector in 1015 bits transferred  
Less than 1 sector in 1021 bits transferred  
Less than 1 error in 1012 bits transferred with minimum receive eye  
Less than 1 error in 1014 bits transferred with typical receive eye  
Unrecovered Data  
Miscorrected Data  
Interface error rate  
MTBF  
1,200,000 hours  
5 years  
Service life  
Preventive maintenance  
None required  
1. Error rate specified with automatic retries and data correction with ECC enabled and all flaws reallocated.  
5.1 Error rates  
The error rates stated in this manual assume the following:  
• The drive is operated in accordance with this manual using DC power as defined in paragraph 6.2, "DC  
• The drive has been formatted with the FC-AL Format command.  
• Errors caused by media defects or host system failures are excluded from error rate computations.  
• Assume random data.  
5.1.0.1  
Interface errors  
An interface error is defined as a failure of the receiver on a port to recover the data as transmitted by the  
device port connected to the receiver. The error may be detected as a running disparity error, illegal code, loss  
of word sync, or CRC error. The total error rate for a loop of devices is the sum of the individual device error  
rates.  
5.1.1  
Environmental interference  
When evaluating systems operation under conditions of electromagnetic interference (EMI), the performance  
of the drive within the system is considered acceptable if the drive does not generate an unrecoverable condi-  
tion.  
An unrecoverable error, or condition, is defined as one that:  
• is not detected and corrected by the drive itself  
• is not detected from the error or fault status provided through the drive or FC-AL interface  
• is not recovered by normal drive or system recovery procedures without operator intervention  
5.1.2  
Write errors  
Write errors can occur as a result of media defects, environmental interference, or equipment malfunction.  
Therefore, write errors are not predictable as a function of the number of bits passed.  
If an unrecoverable write error occurs because of an equipment malfunction in the drive, the error is classified  
as a failure affecting MTBF. Unrecoverable write errors are those that cannot be corrected within two attempts  
at writing the record with a read verify after each attempt (excluding media defects).  
5.1.3  
Seek errors  
A seek error is defined as a failure of the drive to position the heads to the addressed track. After detecting an  
initial seek error, the drive automatically performs an error recovery process. If the error recovery process fails,  
a seek positioning error (15h) is reported with a Medium error (3h) or Hardware error (4h) reported in the  
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Cheetah 10K.6 FC Product Manual, Rev. B  
Sense Key. This is an unrecoverable seek error. Unrecoverable seek errors are classified as failures for MTBF  
calculations. Refer to the Fibre Channel Interface Manual, part number 77767496, for Request Sense informa-  
tion.  
5.2  
Reliability and service  
You can enhance the reliability of Cheetah 10K.6 FC disc drives by ensuring that the drive receives adequate  
cooling. Section 6.0 provides recommended air-flow information, temperature measurements, and other infor-  
mation, which you can use to enhance the service life of the drive.  
5.2.1  
Mean time between failure (MTBF)  
The production disc drive achieves an MTBF of 1,200,000 hours when operated in an environment that  
ensures the case temperatures specified in Section 6.3.1 are not exceeded. Short-term excursions up to the  
specification limits of the operating environment will not affect MTBF performance. Operating the drive at case  
temperatures above these values will adversely affect the drive’s ability to meet specifications. See Section Fig-  
The MTBF target is specified as device power-on hours (POH) for all drives in service per failure.  
The following expression defines MTBF:  
MTBF per measurement period = Estimated power-on operating hours in the period  
Number of drive failures in the period  
Estimated power-on operating hours means power-on hours per disc drive times the total number of disc drives  
in service. Each disc drive must have accumulated at least nine months of operation. Data is calculated on a  
rolling average base for a minimum period of six months.  
MTBF is based on the following assumptions:  
• 8,760 power-on hours per year  
• 250 average on/off cycles per year  
• Operating at nominal voltages  
• System provides adequate cooling to ensure the case temperatures specified in Section 6.3.1 are not  
exceeded.  
Drive failure means any stoppage or failure to meet defined specifications caused by drive malfunction.  
A S.M.A.R.T. predictive failure indicates that the drive is deteriorating to an imminent failure and is considered  
an MTBF hit.  
5.2.2  
Preventive maintenance  
No routine scheduled preventive maintenance is required.  
5.2.3  
Service life  
The drive has a useful service life of five 5 years. Depot repair or replacement of major parts is permitted dur-  
ing the lifetime.  
5.2.4  
Service philosophy  
Special equipment is required to repair the drive HDA. To achieve the above service life, repairs must be per-  
formed only at a properly equipped and staffed Seagate service and repair facility. Troubleshooting and repair  
of PCBs in the field is not recommended because of the extensive diagnostic equipment required for effective  
servicing. There are not spare parts available for this drive. The drive warranty is voided if the HDA is opened.  
5.2.5  
Service tools  
No special tools are required for site installation or recommended for site maintenance. Refer to Section 5.2.4.  
The depot repair philosophy of the drive precludes the necessity for special tools. Field repair of the drive is not  
practical because users cannot purchase individual parts for the drive.  
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5.2.6 Hot plugging the drive  
15  
Inserting and removing the drive on the FC-AL will interrupt loop operation. The interruption occurs when the  
receiver of the next device in the loop must synchronize to a different input signal. FC error detection mecha-  
nisms, character sync, running disparity, word sync, and CRC are able to detect any error. Recovery is initiated  
based on the type of error.  
The disc drive defaults to the FC-AL Monitoring state, Pass-through state, when it is powered-on by switching  
the power or hot plugged. The control line to an optional port bypass circuit (external to the drive), defaults to  
the Enable Bypass state. If the bypass circuit is present, the next device in the loop will continue to receive the  
output of the previous device to the newly inserted device. If the bypass circuit is not present, loop operation is  
temporarily disrupted until the next device starts receiving the output from the newly inserted device and  
regains synchronization to the new input.  
The Pass-through state is disabled while the drive performs self test of the FC interface. The control line for an  
external port bypass circuit remains in the Enable Bypass state while self test is running. If the bypass circuit is  
present, loop operation may continue. If the bypass circuit is not present, loop operation will be halted while the  
self test of the FC interface runs.  
When the self test completes successfully, the control line to the bypass circuit is disabled and the drive enters  
the FC-AL Initializing state. The receiver on the next device in the loop must synchronize to output of the newly  
inserted drive.  
If the self-test fails, the control line to the bypass circuit remains in the Enable Bypass state.  
Note. It is the responsibility of the systems integrator to assure that no temperature, energy, voltage hazard,  
or ESD potential hazard is presented during the hot connect/disconnect operation. Discharge the static  
electricity from the drive carrier prior to inserting it into the system.  
Caution. The drive motor must come to a complete stop prior to changing the plane of operation. This time is  
required to insure data integrity.  
5.2.7  
S.M.A.R.T.  
S.M.A.R.T. is an acronym for Self-Monitoring Analysis and Reporting Technology. This technology is intended  
to recognize conditions that indicate imminent drive failure and is designed to provide sufficient warning of a  
failure to allow you to back up the data before an actual failure occurs.  
Note. The drive’s firmware monitors specific attributes for degradation over time but can’t predict instanta-  
neous drive failures.  
Each monitored attribute has been selected to monitor a specific set of failure conditions in the operating per-  
formance of the drive and the thresholds are optimized to minimize “false” and “failed” predictions.  
Controlling S.M.A.R.T.  
The operating mode of S.M.A.R.T. is controlled by the DEXCPT and PERF bits on the Informational Exceptions  
Control mode page (1Ch). Use the DEXCPT bit to enable or disable the S.M.A.R.T. feature. Setting the DEX-  
CPT bit disables all S.M.A.R.T. functions. When enabled, S.M.A.R.T. collects on-line data as the drive performs  
normal read and write operations. When the PERF bit is set, the drive is considered to be in “On-line Mode  
Only” and will not perform off-line functions.  
You can measure off-line attributes and force the drive to save the data by using the Rezero Unit command.  
Forcing S.M.A.R.T. resets the timer so that the next scheduled interrupt is in two hours.  
You can interrogate the drive through the host to determine the time remaining before the next scheduled mea-  
surement and data logging process occurs. To accomplish this, issue a Log Sense command to log page 0x3E.  
This allows you to control when S.M.A.R.T. interruptions occur. Forcing S.M.A.R.T. with the RTZ command  
resets the timer.  
Performance impact  
S.M.A.R.T. attribute data is saved to the disc so that the events that caused a predictive failure can be recre-  
ated. The drive measures and saves parameters once every two hours subject to an idle period on the FC-AL  
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16  
Cheetah 10K.6 FC Product Manual, Rev. B  
bus. The process of measuring off-line attribute data and saving data to the disc is uninterruptable. The maxi-  
mum on-line only processing delay is summarized below:  
Maximum processing delay  
On-line only delay  
Fully-enabled delay  
DEXCPT = 0, PERF = 1  
DEXCPT = 0, PERF = 0  
S.M.A.R.T. delay times  
300 milliseconds  
50 milliseconds  
Reporting control  
Reporting is controlled by the MRIE bits in the Informational Exceptions Control mode page (1Ch). Subject to  
the reporting method, the firmware will issue to the host an 01-5Dxx sense code. The error code is preserved  
through bus resets and power cycles.  
Determining rate  
S.M.A.R.T. monitors the rate at which errors occur and signals a predictive failure if the rate of degraded errors  
increases to an unacceptable level. To determine rate, error events are logged and compared to the number of  
total operations for a given attribute. The interval defines the number of operations over which to measure the  
rate. The counter that keeps track of the current number of operations is referred to as the Interval Counter.  
S.M.A.R.T. measures error rates. All errors for each monitored attribute are recorded. A counter keeps track of  
the number of errors for the current interval. This counter is referred to as the Failure Counter.  
Error rate is the number of errors per operation. The algorithm that S.M.A.R.T. uses to record rates of error is to  
set thresholds for the number of errors and their interval. If the number of errors exceeds the threshold before  
the interval expires, the error rate is considered to be unacceptable. If the number of errors does not exceed  
the threshold before the interval expires, the error rate is considered to be acceptable. In either case, the inter-  
val and failure counters are reset and the process starts over.  
Predictive failures  
S.M.A.R.T. signals predictive failures when the drive is performing unacceptably for a period of time. The firm-  
ware keeps a running count of the number of times the error rate for each attribute is unacceptable. To accom-  
plish this, a counter is incremented each time the error rate is unacceptable and decremented (not to exceed  
zero) whenever the error rate is acceptable. If the counter continually increments such that it reaches the pre-  
dictive threshold, a predictive failure is signaled. This counter is referred to as the Failure History Counter.  
There is a separate Failure History Counter for each attribute.  
5.2.8  
Drive Self Test (DST)  
Drive Self Test (DST) is a technology designed to recognize drive fault conditions that qualify the drive as a  
failed unit. DST validates the functionality of the drive at a system level.  
There are two test coverage options implemented in DST:  
1. Extended test  
2. Short text  
The most thorough option is the extended test that performs various tests on the drive and scans every logical  
block address (LBA) of the drive. The short test is time-restricted and limited in length—it does not scan the  
entire media surface, but does some fundamental tests and scans portions of the media.  
If DST encounters an error during either of these tests, it reports a fault condition. If the drive fails the test,  
remove it from service and return it to Seagate for service.  
5.2.8.1  
DST Failure Definition  
The drive will present a “diagnostic failed” condition through the self-tests results value of the diagnostic log  
page if a functional failure is encountered during DST. The channel and servo parameters are not modified to  
test the drive more stringently, and the number of retries are not reduced. All retries and recovery processes  
are enabled during the test. If data is recoverable, no failure condition will be reported regardless of the number  
of retries required to recover the data.  
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17  
The following conditions are considered DST failure conditions:  
• Seek error after retries are exhausted  
Track-follow error after retries are exhausted  
• Read error after retries are exhausted  
• Write error after retries are exhausted  
Recovered errors will not be reported as diagnostic failures.  
5.2.8.2  
Implementation  
This section provides all of the information necessary to implement the DST function on this drive.  
5.2.8.2.1  
State of the drive prior to testing  
The drive must be in a ready state before issuing the Send Diagnostic command. There are multiple reasons  
why a drive may not be ready, some of which are valid conditions, and not errors. For example, a drive may be  
in process of doing a format, or another DST. It is the responsibility of the host application to determine the “not  
ready” cause.  
While not technically part of DST, a Not Ready condition also qualifies the drive to be returned to Seagate as a  
failed drive.  
A Drive Not Ready condition is reported by the drive under the following conditions:  
• Motor will not spin  
• Motor will not lock to speed  
• Servo will not lock on track  
• Drive cannot read configuration tables from the disc  
In these conditions, the drive responds to a Test Unit Ready command with an 02/04/00 or 02/04/03 code.  
5.2.8.2.2  
Invoking DST  
To invoke DST, submit the Send Diagnostic command with the appropriate Function Code (001b for the short  
test or 010b for the extended test) in bytes 1, bits 5, 6, and 7. Refer to the Fibre Channel Interface Product  
Manual, part number 77767496, for additional information about invoking DST.  
5.2.8.2.3  
Short and extended tests  
DST has two testing options:  
1. short  
2. extended  
These testing options are described in the following two subsections.  
Each test consists of three segments: an electrical test segment, a servo test segment, and a read/verify scan  
segment.  
Short test (Function Code: 001b)  
The purpose of the short test is to provide a time-limited test that tests as much of the drive as possible within  
120 seconds. The short test does not scan the entire media surface, but does some fundamental tests and  
scans portions of the media. A complete read/verify scan is not performed and only factual failures will report a  
fault condition. This option provides a quick confidence test of the drive.  
Extended test (Function Code: 010b)  
The objective of the extended test option is to empirically test critical drive components. For example, the seek  
tests and on-track operations test the positioning mechanism. The read operation tests the read head element  
and the media surface. The write element is tested through read/write/read operations. The integrity of the  
media is checked through a read/verify scan of the media. Motor functionality is tested by default as a part of  
these tests.  
The anticipated length of the Extended test is reported through the Control Mode page.  
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5.2.8.2.4  
Log page entries  
When the drive begins DST, it creates a new entry in the Self-test Results Log page. The new entry is created  
by inserting a new self-test parameter block at the beginning of the self-test results log parameter section of the  
log page. Existing data will be moved to make room for the new parameter block. The drive reports 20 parame-  
ter blocks in the log page. If there are more than 20 parameter blocks, the least recent parameter block will be  
deleted. The new parameter block will be initialized as follows:  
1. The Function Code field is set to the same value as sent in the DST command  
2. The Self-Test Results Value field is set to Fh  
3. The drive will store the log page to non-volatile memory  
After a self-test is complete or has been aborted, the drive updates the Self-Test Results Value field in its Self-  
Test Results Log page in non-volatile memory. The host may use Log Sense to read the results from up to the  
last 20 self-tests performed by the drive. The self-test results value is a 4-bit field that reports the results of the  
test. If the field is zero, the drive passed with no errors detected by the DST. If the field is not zero, the test  
failed for the reason reported in the field.  
The drive will report the failure condition and LBA (if applicable) in the Self-test Results Log parameter. The  
Sense key, ASC, ASCQ, and FRU are used to report the failure condition.  
5.2.8.2.5  
Abort  
There are several ways to abort a diagnostic. You can use a SCSI Bus Reset or a Bus Device Reset message  
to abort the diagnostic.  
You can abort a DST executing in background mode by using the abort code in the DST Function Code field.  
This will cause a 01 (self-test aborted by the application client) code to appear in the self-test results values  
log. All other abort mechanisms will be reported as a 02 (self-test routine was interrupted by a reset condition).  
5.2.9  
Product warranty  
Beginning on the date of shipment to the customer and continuing for a period of five years, Seagate warrants  
that each product (including components and subassemblies) that fails to function properly under normal use  
due to defect in materials or workmanship or due to nonconformance to the applicable specifications will be  
repaired or replaced, at Seagate’s option and at no charge to the customer, if returned by customer at cus-  
tomer’s expense to Seagate’s designated facility in accordance with Seagate’s warranty procedure. Seagate  
will pay for transporting the repair or replacement item to the customer. For more detailed warranty information,  
refer to the standard terms and conditions of purchase for Seagate products. Refer to Section 10 for contact  
information.  
Shipping  
When transporting or shipping a drive, use only a Seagate-approved container. Keep your original box.  
Seagate approved containers are easily identified by the Seagate Approved Package label. Shipping a drive in  
a non-approved container voids the drive warranty.  
Seagate repair centers may refuse receipt of components improperly packaged or obviously damaged in tran-  
sit. Contact your authorized Seagate distributor to purchase additional boxes. Seagate recommends shipping  
by an air-ride carrier experienced in handling computer equipment.  
Product repair and return information  
Seagate customer service centers are the only facilities authorized to service Seagate drives. Seagate does  
not sanction any third-party repair facilities. Any unauthorized repair or tampering with the factory seal voids  
the warranty.  
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19  
6.0  
Physical/electrical specifications  
This section provides information relating to the physical and electrical characteristics of the drive.  
6.1  
AC power requirements  
None.  
6.2  
DC power requirements  
The voltage and current requirements for a single drive are shown below. Values indicated apply at the drive  
connector.  
Table 1:  
DC power requirements  
ST3146807FC  
ST373307FC  
ST336607FC  
Notes  
(Amps)  
(Amps)  
(Amps)  
(Amps)  
(Amps)  
(Amps)  
Voltage  
+5V [8]  
5%  
+12V [2]  
5% [2]  
0.51  
+5V [8]  
5%  
+12V [2]  
5% [2]  
0.37  
+5V [8]  
5%  
+12V [2]  
5% [2]  
0.27  
Regulation  
[5]  
Avg idle current DC  
Maximum starting current  
(peak DC) DC  
(peak AC) AC  
X
[1] [7]  
0.92  
0.91  
0.93  
3σ [3]  
1.09  
1.38  
0.70  
1.48  
2.61  
0.02  
1.02  
1.36  
0.70  
1.26  
2.30  
0.02  
0.99  
1.30  
0.71  
1.04  
1.94  
0.02  
3σ [3]  
Delayed motor start (max) DC 3σ [1] [4]  
Peak operating current:  
Typical DC  
X
[1] [6]  
0.97  
0.99  
1.50  
0.94  
0.95  
2.40  
0.97  
0.98  
1.54  
0.88  
0.89  
2.30  
0.99  
1.00  
1.46  
0.75  
0.78  
2.06  
Maximum DC  
3σ [1]  
Maximum (peak) DC  
3σ  
[1] Measured with average reading DC ammeter. Instantaneous +12V current peaks will exceed these val-  
ues. Power supply at nominal voltage. Number of drives tested = 6, 22 Degrees C ambient.  
[2] For +12 V, a 10% tolerance is allowed during initial spindle start but must return to 5% before reaching  
10,000 RPM. The 5% must be maintained after the drive signifies that its power-up sequence has been  
completed and that the drive is able to accept selection by the host initiator.  
[3] See +12V current profile in Figure 3.  
[4] This condition occurs when the Motor Start option is enabled and the drive has not yet received a Start  
Motor command.  
[5] See paragraph 6.2.1, "Conducted noise immunity." Specified voltage tolerance includes ripple, noise, and  
transient response.  
[6] Operating condition is defined as random 8 block reads at (ST3146807 at 234, ST373307 at 239 and  
ST336607 at 239) I/Os per second. Current and power specified at nominal voltages. Decreasing +5 volt  
supply by 5% increases 5 volt current by 3.6%. Decreasing +12 volt supply by 5% increases 12 volt cur-  
rent by 3%.  
[7] During idle, the drive heads are relocated every 60 seconds to a random location within the band from  
track zero to one-fourth of maximum track.  
[8] Values shown are for operation at 2 Gb; for operation at 1 Gb, reduce the +5V by 0.10 amps. The +12V  
current values are not affected by loop speed.  
General DC power requirement notes.  
1. Minimum current loading for each supply voltage is not less than 0.8% of the maximum operating current  
shown.  
2. The +5V and +12V supplies should employ separate ground returns.  
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20  
Cheetah 10K.6 FC Product Manual, Rev. B  
3. Where power is provided to multiple drives from a common supply, careful consideration for individual drive  
power requirements should be noted. Where multiple units are powered on simultaneously, the peak start-  
ing current must be available to each device.  
4. Parameters, other than spindle start, are measured after a 10-minute warm up.  
5. No terminator power.  
6.2.1  
Conducted noise immunity  
Noise is specified as a periodic and random distribution of frequencies covering a band from DC to 10 MHz.  
Maximum allowed noise values given below are peak-to-peak measurements and apply at the drive power  
connector.  
+5V  
+12V  
0 to 100 kHz  
150mV  
100mV  
150mV  
100mV  
100 kHz to 10 MHz  
6.2.2  
Power sequencing  
The drive does not require power sequencing. The drive protects against inadvertent writing during power-up  
and down.  
6.2.3  
Current profiles  
Figures 3, 4 and 5 identify the drive +12V current profiles for each model ST3146807FC, ST3733307FC and  
ST336607FC, respectively. The current during the various times is as shown:  
T0 Power is applied to the drive.  
T1 Controller self-tests are performed.  
T2 Spindle begins to accelerate under current limiting after performing internal diagnostics.  
T3 Spindle is up to speed and the Head-Arm restraint is unlocked.  
Note: All times and currents are typical. See Table 1 for maximum current requirements.  
Figure 3.  
Typical ST3146807FC drive +12V current profile  
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21  
Figure 4.  
Typical ST373307FC drive +12V current profile  
Figure 5.  
Typical ST336607FC drive +12V current profile  
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22  
Cheetah 10K.6 FC Product Manual, Rev. B  
Figures 6, 7 and 8 identify the drive +5V current profiles for each model ST3146807FC, ST3733307FC and  
ST336607FC, respectively. The current during the various times is as shown:  
T0 Power is applied to the drive.  
T1 Controller self-tests are performed.  
T2 Spindle begins to accelerate under current limiting after performing internal diagnostics.  
T3 Spindle is up to speed and the Head-Arm restraint is unlocked.  
Figure 6.  
Typical ST3146807FC drive +5V current profile  
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23  
Figure 7.  
Typical ST373307FC drive +5V current profile  
Figure 8.  
Typical ST336607FC drive +5V current profile  
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24  
Cheetah 10K.6 FC Product Manual, Rev. B  
6.3  
Power dissipation  
ST3146807FC  
Typical power dissipation under idle conditions is 10.72 watts (37.3 BTUs per hour).  
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure  
9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5  
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by  
3.4123.  
ST3146807FC DC CURRENT/POWER vs THROUGHPUT (2 Gb)  
Random 8 Block Reads  
1.800  
1.600  
1.400  
1.200  
1.000  
0.800  
0.600  
0.400  
18 . 0 0  
16 . 0 0  
14 . 0 0  
12 . 0 0  
10 . 0 0  
8.00  
5Volt A  
12 V o lt A  
Watts  
6.00  
4.00  
0.0  
50.0  
100.0  
150.0  
200.0  
250.0  
I/Os per Second  
Figure 9.  
ST3146807FC DC current and power vs. input/output operations per second  
Note. Values shown are for operation at 2Gb, for operation at 1Gb, reduce the +5V by.10 amps. The +12V  
current values are not affected by loop speed.  
ST373307FC  
Typical power dissipation under idle conditions is 8.99 watts (30.7 BTUs per hour).  
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure  
9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5  
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by  
3.4123.  
ST373307 FC CURRENT/POWER vs THROUGHPUT (2 gig)  
Random 8 Block Reads  
1.8 0 0  
1.6 0 0  
1.4 0 0  
1.2 0 0  
1.0 0 0  
0.800  
0.600  
0.400  
18 . 0 0  
16 . 0 0  
14 . 0 0  
12 . 0 0  
10 . 0 0  
8.00  
5Volt A  
12 V o l t A  
Watts  
6.00  
4.00  
0.0  
50.0  
100.0  
150.0  
200.0  
250.0  
300.0  
I/Os per Second  
Figure 10.  
ST373307FC DC current and power vs. input/output operations per second  
Note. Values shown are for operation at 2Gb, for operation at 1Gb, reduce the +5V by.10Amps. The +12V  
current values are not affected by loop speed.  
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25  
ST336607FC  
Typical power dissipation under idle conditions is 7.89 watts (26.9 BTUs per hour).  
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure  
9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresponding +5  
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by  
3.4123.  
ST336607 FC CURRENT/POWER vs THROUGHPUT (2 gig)  
Random 8 Block Reads  
18 .0 0  
5Volt A  
1.7 0 0  
12 V o lt A  
16 .0 0  
Watts  
1.5 0 0  
14 .0 0  
1.3 0 0  
12 .0 0  
1. 10 0  
10 .0 0  
0.900  
8.00  
0.700  
6.00  
4.00  
0.500  
0.300  
0.0  
50.0  
100.0  
150.0  
200.0  
250.0  
I/Os per Second  
Figure 11.  
ST336607FC DC current and power vs. input/output operations per second  
Note. Values shown are for operation at 2 Gb, for operation at 1 Gb, reduce the +5V by.10Amps. The +12V  
current values are not affected by loop speed.  
Figure 12.  
Environmental limits  
Temperature and humidity values experienced by the drive must be such that condensation does not occur on  
any drive part. Altitude and atmospheric pressure specifications are referenced to a standard day at 58.7°F  
(14.8°C). Maximum wet bulb temperature is 82°F (28°C).  
6.3.1  
Temperature  
a. Operating  
With cooling designed to maintain the case temperature, the drive meets all specifications over a 41°F to  
131°F (5°C to 55°C) drive ambient temperature range with a maximum temperature gradient of 36°F (20°C)  
per hour. The enclosure for the drive should be designed such that these temperatures are not exceeded.  
Air flow may be needed to achieve these temperature values (see Section 8.4). Operation at HDA case tem-  
peratures above these values may adversely affect the drives ability to meet specifications.  
The MTBF specification for the drive is based on operating in an environment that ensures that the HDA  
case temperatures are not exceeded. Occasional excursions to drive ambient temperatures of 131°F  
(55°C) or 41°F (5°C) may occur without impact to specified MTBF. Air flow may be needed to achieve these  
temperatures. Continual or sustained operation at HDA case temperatures above these values may  
degrade MTBF. The maximum allowable continuous or sustained HDA case temperature for the rated  
MTBF is 122°F (50°C).  
To confirm that the required cooling for the HDA is provided, place the drive in its final mechanical configu-  
ration, perform random write/read operations. After the temperatures stabilize, measure the case tempera-  
ture.  
The maximum allowable HDA case temperature is 60°C. Operation of the drive at the maximum case tem-  
perature is intended for short time periods only. Continuous operation at the elevated temperatures will  
reduce product reliability.  
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26  
Cheetah 10K.6 FC Product Manual, Rev. B  
b. Non-operating  
–40° to 158°F (–40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This  
specification assumes that the drive is packaged in the shipping container designed by Seagate for use with  
drive.  
HDA Temp.  
Check Point  
.5"  
Figure 13. Location of the HDA Temperature check point  
6.3.2  
Relative humidity  
The values below assume that no condensation on the drive occurs.  
a. Operating  
5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour.  
b. Non-operating  
5% to 95% non-condensing relative humidity.  
6.3.3  
Effective altitude (sea level)  
a. Operating  
–1,000 to +10,000 feet (–305 to +3,048 meters)  
b. Non-operating  
–1,000 to +40,000 feet (–305 to +12,210 meters)  
6.3.4  
Shock and vibration  
Shock and vibration limits specified in this document are measured directly on the drive chassis. If the drive is  
installed in an enclosure to which the stated shock and/or vibration criteria is applied, resonances may occur  
internally to the enclosure resulting in drive movement in excess of the stated limits. If this situation is apparent,  
it may be necessary to modify the enclosure to minimize drive movement.  
The limits of shock and vibration defined within this document are specified with the drive mounted by any of  
the four methods shown in Figure 14, and in accordance with the restrictions of Section 8.5. Orientation of the  
side nearest the LED may be up or down.  
6.3.4.1  
Shock  
a. Operating—normal  
The drive, as installed for normal operation, shall operate error free while subjected to intermittent shock not  
exceeding 15 Gs at a maximum duration of 11 msec (half sinewave). The drive, as installed for normal oper-  
ation, shall operate error free while subjected to intermittent shock not exceeding 15 Gs at a maximum  
duration of 2 msec (half sinewave). Shock may be applied in the X, Y, or Z axis.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
27  
b. Operating—abnormal  
Equipment, as installed for normal operation, does not incur physical damage while subjected to intermit-  
tent shock not exceeding 40 Gs at a maximum duration of 11 msec (half sinewave). Shock occurring at  
abnormal levels may promote degraded operational performance during the abnormal shock period. Speci-  
fied operational performance will continue when normal operating shock levels resume. Shock may be  
applied in the X, Y, or Z axis. Shock is not to be repeated more than two times per second.  
c. Non-operating  
The limits of non-operating shock shall apply to all conditions of handling and transportation. This includes  
both isolated drives and integrated drives.  
The drive subjected to nonrepetitive shock not exceeding 75 Gs at a maximum duration of 11 msec (half  
sinewave) shall not exhibit device damage or performance degradation. Shock may be applied in the X, Y,  
or Z axis.  
The drive subjected to nonrepetitive shock not exceeding 225 Gs at a maximum duration of 2 msec (half  
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,  
or Z axis.  
The drive subjected to nonrepetitive shock not exceeding 120 Gs at a maximum duration of 0.5 msec (half  
sinewave) does not exhibit device damage or performance degradation. Shock may be applied in the X, Y,  
or Z axis.  
d. Packaged  
Disc drives shipped as loose load (not palletized) general freight will be packaged to withstand drops from  
heights as defined in the table below. For additional details refer to Seagate specifications 30190-001  
(under 100 lbs/45 kg) or 30191-001 (over 100 lbs/45 Kg).  
Package size  
Packaged/product weight  
Drop height  
<600 cu in (<9,800 cu cm)  
Any  
60 in (1524 mm)  
48 in (1219 mm)  
42 in (1067 mm)  
36 in (914 mm)  
600-1800 cu in (9,800-19,700 cu cm)  
>1800 cu in (>19,700 cu cm)  
>600 cu in (>9,800 cu cm)  
0-20 lb (0 to 9.1 kg)  
0-20 lb (0 to 9.1 kg)  
20-40 lb (9.1 to 18.1 kg)  
Drives packaged in single or multipacks with a gross weight of 20 pounds (8.95 kg) or less by Seagate for  
general freight shipment shall withstand a drop test from 48 inches (1,070 mm) against a concrete floor or  
equivalent.  
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28  
Cheetah 10K.6 FC Product Manual, Rev. B  
Z
X
Y
X
Z
Y
Figure 14. Recommended mounting  
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29  
6.3.4.2  
Vibration  
a. Operating - normal  
The drive as installed for normal operation, shall comply with the complete specified performance while  
subjected to continuous vibration not exceeding  
5-500 Hz @ 1.0 G (zero to peak)  
Vibration may be applied in the X, Y, or Z axis.  
Operating normal translational random flat profile  
10 - 400 Hz  
0.4 GRMS  
b. Operating - abnormal  
Equipment as installed for normal operation shall not incur physical damage while subjected to periodic  
vibration not exceeding:  
15 minutes of duration at major resonant frequency  
5-500 Hz @ 1.5 G (X, Y, or Z axis)  
Vibration occurring at these levels may degrade operational performance during the abnormal vibration  
period. Specified operational performance will continue when normal operating vibration levels are  
resumed. This assumes system recovery routines are available.  
Operating abnormal translational random flat profile  
10 - 400 Hz  
1.2 GRMS  
c. Non-operating  
The limits of non-operating vibration shall apply to all conditions of handling and transportation. This  
includes both isolated drives and integrated drives.  
The drive shall not incur physical damage or degraded performance as a result of continuous vibration not  
exceeding  
5-22 Hz @ 0.040 inches (1.02 mm) displacement (zero to peak)  
22-400 Hz @ 4.00 G (zero to peak)  
Vibration may be applied in the X, Y, or Z axis.  
Non-operating translational random flat profile  
10 - 400 Hz  
1.2 GRMS  
6.3.5  
Air cleanliness  
The drive is designed to operate in a typical office environment with minimal environmental control.  
6.3.6  
Acoustics  
Sound power during idle mode shall be 3.6 bels typical when measured to ISO 7779 specification.  
There will not be any discrete tones more than 10 dB above the masking noise on typical drives when mea-  
sured according to Seagate specification 30553-001. There will not be any tones more than 24 dB above the  
masking noise on any drive.  
6.3.7  
Electromagnetic susceptibility  
See Section 2.1.1.1.  
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30  
Cheetah 10K.6 FC Product Manual, Rev. B  
6.4  
Mechanical specifications  
The following nominal dimensions are exclusive of the decorative front panel accessory. However, dimensions  
of the front panel are shown in figure below. Refer to Figure 15 for detailed mounting configuration dimensions.  
See Section 8.5, “Drive mounting.”  
Height:  
Width:  
Depth:  
Weight:  
1.000 in  
4.000 in  
5.75 in  
25.4 mm  
101.6 mm  
146.05 mm  
0.734 kilograms  
1.62 pounds  
K
//  
T
-Z-  
S
[1]  
-Z-  
H
L
J
B
Notes:  
R
Mounting holes are 6-32 UNC 2B, three  
on each side and four on the bottom.  
Max screw penetration into side of drive  
is 0.15 in. (3.81 mm). Max screw  
tightening torque is 6.0 in-lb (3.32 nm)  
with minimum full thread engagement of  
0.12 in. (3.05 mm).  
[1]  
N
-Z- -X-  
A
-Z-  
M
U -X-  
Dimension Table  
Inches  
1.028 max  
5.787 max  
Millimeters  
P
A
B
C
D
E
F
H
J
K
L
M
P
R
S
T
26.10 max  
147.00 max  
101.60 .25  
95.25 .25  
3.18 .25  
44.45 .25  
28.50 .50  
101.60 .25  
6.35 .25  
41.60 .25  
4.60 .50  
41.28 .50  
41.10 .08  
7.00 1.02  
0.38 max  
[1]  
4.000 .010  
3.750 .010  
0.125 .010  
1.750 .010  
1.122 .020  
4.000 .010  
0.250 .010  
1.638 .010  
0.181 .020  
1.625 .020  
1.618 .003  
0.276 .040  
.015 max  
F
U
.015 max  
0.38 max  
E
D
C
-X-  
Figure 15. Mounting configuration dimensions  
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Cheetah 10K.6 FC Product Manual, Rev. B  
31  
7.0  
Defect and error management  
The drive, as delivered, complies with this product manual. The read error rates and specified storage capaci-  
ties are not dependent upon use of defect management routines by the host (initiator).  
Defect and error management in the SCSI protocol involves the drive internal defect/error management and  
FC-AL system error considerations (errors in communications between the initiator and the drive). Tools for use  
in designing a defect/error management plan are briefly outlined in this section. References to other sections  
are provided when necessary.  
7.1  
Drive internal defects/errors  
During the initial drive format operation at the factory, media defects are identified, tagged as being unusable,  
and their locations recorded on the drive primary defects list (referred to as the “P’ list and also as the ETF  
defect list). At factory format time, these known defects are also reallocated, that is, reassigned to a new place  
on the medium and the location listed in the defects reallocation table. The “P” list is not altered after factory  
formatting. Locations of defects found and reallocated during error recovery procedures after drive shipment  
are listed in the “G” list (defects growth list). The “P” and “G” lists may be referenced by the initiator using the  
Read Defect Data command.  
Details of the SCSI commands supported by the drive are described in the Fibre Channel Interface Manual.  
Also, more information on the drive Error Recovery philosophy is presented in the Fibre Channel Interface  
Manual.  
7.2  
Drive error recovery procedures  
When an error occurs during drive operation, the drive, if programmed to do so, performs error recovery proce-  
dures to attempt to recover the data. The error recovery procedures used depend on the options previously set  
in the Error Recovery Parameters mode page. Error recovery and defect management may involve using sev-  
eral SCSI commands described in the Fibre Channel Interface Manual. The drive implements selectable error  
recovery time limits required in video applications.  
The error recovery scheme supported by the drive provides a way to control the total error recovery time for the  
entire command in addition to controlling the recovery level for a single LBA. The total amount of time spent in  
error recovery for a command can be limited using the Recovery Time Limit bytes in the Error Recovery mode  
page. The total amount of time spent in error recovery for a single LBA can be limited using the Read Retry  
Count or Write Retry Count bytes in the Error Recovery mode page.  
The drive firmware error recovery algorithms consists of 12 levels for read recoveries and five levels for write.  
Each level may consist of multiple steps, where a step is defined as a recovery function involving a single re-  
read or re-write attempt. The maximum level used by the drive in LBA recovery is determined by the read and  
write retry counts.  
Table 2 equates the read and write retry count with the maximum possible recovery time for read and write  
recovery of individual LBAs. The times given do not include time taken to perform reallocations. Reallocations  
are performed when the ARRE bit (for reads) or AWRE bit (for writes) is one, the RC bit is zero, and the recov-  
ery time limit for the command has not yet been met. Time needed to perform reallocation is not counted  
against the recovery time limit.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
When the RC bit is one, reallocations are disabled even if the ARRE or AWRE bits are one. The drive will still  
perform data recovery actions within the limits defined by the Read Retry Count, Write Retry Count, and  
Recovery Time Limit parameters. However, the drive does not report any unrecovered errors.  
Table 2:  
Read and write retry count maximum recovery times  
Read retry  
Maximum recovery time per  
LBA (cumulative, msec)  
Write retry  
Maximum recovery time per  
LBA (cumulative, msec)  
count1  
count1  
0
77.7  
0
35.9  
1
89.7  
1
53.8  
2
305.0  
328.9  
370.8  
418.6  
532.3  
544.3  
568.2  
622.0  
682.5  
1,377.5  
2
59.8  
3
3
113.7  
227.4  
269.2  
4
4
5
5 (default)  
6
7
8
9
10  
11 (default)  
[1] Setting these retry counts to a value below the default setting could result in degradation of the unrecov-  
ered error rate. For example, suppose the read/write recovery page has the RC bit = 0, the read retry  
count set to 4, and the recovery time limit set to 450. A 4-block read command can take up to 370.8 msec  
recovery time for each block and a maximum of 450 msec recovery for all four blocks. If either of these lim-  
its is reached and a block has not yet been recovered, the command will end with Check Condition status  
and an unrecoverable read error will be reported.  
7.3  
FC-AL system errors  
Information on the reporting of operational errors or faults across the interface is given in the Fibre Channel  
Interface Manual. The FCP Response returns information to the host about numerous kinds of errors or faults.  
The Receive Diagnostic Results reports the results of diagnostic operations performed by the drive.  
Status returned by the drive to the initiator is described in the Fibre Channel Interface Manual. Status reporting  
plays a role in systems error management and its use in that respect is described in sections where the various  
commands are discussed.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
33  
8.0  
Installation  
Cheetah 10K.6 FC disc drive installation is a plug-and-play process. There are no jumpers, switches, or termi-  
nators on the drive. Simply plug the drive into the host’s 40-pin Fibre Channel backpanel connector (FC-  
SCA)no cables are required. See Section 9.5 for additional information about this connector.  
Use the FC-AL interface to select drive ID and all option configurations for devices on the loop.  
If multiple devices are on the same FC-AL and physical addresses are used, set the device selection IDs (SEL  
IDs) on the backpanel so that no two devices have the same selection ID. This is called the hard assigned arbi-  
trated loop physical address (AL_PA). There are 125 AL_PAs available (see Table 23). If you set the AL_PA on  
the backpanel to any value other than 0, the device plugged into the backpanel’s SCA connector inherits this  
AL_PA. In the event you don’t successfully assign unique hard addresses (and therefore have duplicate selec-  
tion IDs assigned to two or more devices), the FC-AL generates a message indicating this condition. If you set  
the AL_PA on the backpanel to a value of 0, the system issues a unique soft-assigned physical address auto-  
matically.  
Loop initialization is the process used to verify or obtain an address. The loop initialization process is per-  
formed when power is applied to the drive, when a device is added or removed from the Fibre Channel loop, or  
when a device times out attempting to win arbitration.  
• Set all option selections in the connector prior to applying power to the drive. If you change options after  
applying power to the drive, recycle the drive power to activate the new settings.  
• It is not necessary to low-level format this drive. The drive is shipped from the factory low-level formatted in  
512-byte logical blocks. You need to reformat the drive only if you want to select a different logical block size.  
8.1  
Drive ID/option selection  
All drive options are made through the interface connector (J1). Table provides the pin descriptions for the 40-  
pin Fibre Channel single connector (J1).  
8.2  
LED connections  
A connector, J6, is provided on the printed circuit board assembly (PCBA) to provide port bypass, drive active,  
and drive fault LED connections (see Figure 17). See Sections 9.5.7, 9.5.8, and 9.5.9 for descriptions of LED  
functions.  
J6  
Figure 16.  
Physical interface  
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34  
Cheetah 10K.6 FC Product Manual, Rev. B  
Drive  
Front  
Pin 1  
J6  
Reserved  
Port A Bypass LED [1]  
Port B Bypass LED [1]  
Fault LED [1]  
Reserved  
Active LED [2]  
Reserved  
+5V  
Active LED [1]  
Ground [3]  
[1] The drive has a 1.2K ohm resistor in series with this LED driver. Tie the minus side of an  
external high-efficiency LED (i.e., 2ma) to this pin. Connect the plus side of the LED to  
+5V.  
[2] An external current-limiting resistor is required when connecting an LED to this pin. The  
minus side of the resistor/LED combination is connected to this pin. Connect the plus side  
to +5V.  
[3] Jumper storage location (across pins 2 and 4).  
Figure 17.  
8.2.1  
LED indicator connector  
J6 connector requirements  
Recommended mating connector part number: Berg receptacle, 6-position, Berg part number 690-006.  
8.3 Drive orientation  
The drive may be mounted in any orientation. All drive performance characterizations, however, have been  
done with the drive in horizontal (discs level) and vertical (drive on its side) orientations, which are the two pre-  
ferred mounting orientations.  
8.4  
Cooling  
Cabinet cooling must be designed by the customer so that the ambient temperature immediately surrounding  
the drive will not exceed temperature conditions specified in Section 6.3.1, "Temperature."  
The rack, cabinet, or drawer environment for the drive must provide heat removal from the electronics and  
head and disc assembly (HDA). You should confirm that adequate heat removal is provided using the tempera-  
ture measurement guidelines described in Section 6.3.1.  
Forced air flow may be required to keep temperatures at or below the temperatures specified in Section 6.3.1,  
in which case the drive should be oriented, or air flow directed, so that the least amount of air flow resistance is  
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Cheetah 10K.6 FC Product Manual, Rev. B  
35  
created while providing air flow to the electronics and HDA. Also, the shortest possible path between the air  
inlet and exit should be chosen to minimize the travel length of air heated by the drive and other heat sources  
within the rack, cabinet, or drawer environment.  
If forced air is determined to be necessary, possible air-flow patterns are shown in Figure 18. The air-flow pat-  
terns are created by one or more fans, either forcing or drawing air as shown in the illustrations. Conduction,  
convection, or other forced air-flow patterns are acceptable as long as the temperature measurement guide-  
lines of Section 6.3.1 are met.  
Above unit  
Under unit  
Note. Air flows in the direction shown (front to back)  
or in reverse direction (back to front)  
Above unit  
Note. Air flows in the direction shown or  
Under unit  
in reverse direction (side to side)  
Figure 18.  
8.5  
Air flow  
Drive mounting  
Mount the drive using the bottom or side mounting holes. If you mount the drive using the bottom holes, ensure  
that you do not physically distort the drive by attempting to mount it on a stiff, non-flat surface.  
The allowable mounting surface stiffness is 80 lb/in (14.0 N/mm). The following equation and paragraph define  
the allowable mounting surface stiffness:  
K x X = F < 15lb = 67N  
where K is the mounting surface stiffness (units in lb/in or N/mm) and X is the out-of-plane surface distortion  
(units in inches or millimeters). The out-of-plane distortion (X) is determined by defining a plane with three of  
the four mounting points fixed and evaluating the out-of-plane deflection of the fourth mounting point when a  
known force (F) is applied to the fourth point.  
Note. Before mounting the drive in any kind of 3.5-inch to 5.25-inch adapter frame, verify with Seagate Tech-  
nology that the drive can meet the shock and vibration specifications given herein while mounted in  
such an adapter frame. Adapter frames that are available may not have a mechanical structure capa-  
ble of mounting the drive so that it can meet the shock and vibration specifications listed in this manual.  
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36  
Cheetah 10K.6 FC Product Manual, Rev. B  
8.6  
Grounding  
Signal ground (PCBA) and HDA ground are connected together in the drive and cannot be separated by the  
user. The equipment in which the drive is mounted is connected directly to the HDA and PCBA with no electri-  
cally isolating shock mounts. If it is desired for the system chassis to not be connected to the HDA/PCBA  
ground, the systems integrator or user must provide a nonconductive (electrically isolating) method of mount-  
ing the drive in the host equipment.  
Increased radiated emissions may result if you do not provide the maximum surface area ground connection  
between system ground and drive ground. This is the system designer’s and integrator’s responsibility.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
37  
9.0  
Interface requirements  
This section partially describes the interface requirements as implemented on Cheetah 10K.6 FC drives. Addi-  
tional information is provided in the Fibre Channel Interface Manual (part number 77767496).  
9.1  
FC-AL features  
This section lists the Fibre Channel-specific features supported by Cheetah 10K.6 FC drives.  
9.1.1  
Fibre Channel link service frames  
Table 3 lists the link services supported by Cheetah 10K.6 FC drives.  
Table 3:  
Link services supported  
Type of frame  
Link service  
Basic link service frames  
Abort Sequence (ABTS)  
Basic link service reply frames  
Basic_Accept (BA_ACC)  
Basic_Reject (BA_RJT)  
Extended link service frames  
N_Port Login (PLOGI)  
Fabric Login (FLOGI)  
Logout (LOGO)  
Process Login (PRLI)  
Process Logout (PRLO)  
Read Link Status (RLS)  
Fabric Address Notification (FAN)  
Port Discovery (PDISC)  
Address Discovery (ADISC)  
Third-party Process Logout (TRPLO)  
Extended link service reply frames  
Fibre Channel Services  
Accept (ACC)  
Link Service Reject (LS_RJT)  
Register FC-4 Types (RFT_ID)  
9.1.2  
Fibre Channel task management functions  
Table 4 lists the Fibre Channel SCSI Fibre Channel Protocol (FC SCSI FCP) task management functions sup-  
ported.  
Table 4:  
Fibre Channel SCSI FCP task management functions  
Supported  
Task name  
Terminate task  
Clear ACA  
No  
Yes  
Yes  
Yes  
Yes  
Target reset  
Clear task set  
Abort task set  
9.1.3  
Fibre Channel task management responses  
Table 5 lists the FC SCSI FCP response codes returned for task management functions supported.  
Table 5:  
FC SCSI FCP response codes  
Function name  
Response code  
Function complete  
Function not supported  
Function reject  
00  
04  
05  
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38  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.1.4  
Fibre Channel port login  
Table 6 identifies the required content of the N_Port Login (PLOGI) payload from an initiator.  
Table 6:  
Bytes  
N_Port login (PLOGI) payload  
0-15  
03  
00  
00  
00  
XX XX BB BB CF XX FS FS XX XX XX XX Common  
16-31  
32-35  
36-47  
48-51  
52-63  
64-67  
68-79  
80-83  
84-95  
96-99  
100-111  
112-115  
XX XX XX XX PN PN PN PN PN PN PN PN NN NN NN NN  
NN NN NN NN  
XX XX XX XX XX XX XX XX XX XX XX XX Class 1  
XX XX XX XX  
XX XX XX XX XX XX XX XX XX XX XX XX Class 2  
XX XX XX XX  
SO SO IC  
IC  
XX XX FS FS XX CS XX XX Class 3  
OS OS XX XX  
XX XX XX XX  
XX XX XX XX  
XX XX XX XX XX XX XX XX XX XX XX XX Reserved  
XX XX XX XX XX XX XX XX XX XX XX XX Vendor  
Version  
X
Indicates a four-bit (hex) field is not checked.  
x
Indicates a single bit is not checked.  
BB  
CF  
BB-Credit. This field is not checked. The FC-AL drive uses BB-Credit of zero (0).  
Common features. This binary field selects the common features requested by the initiator login.  
MSB  
Continuously increasing offset  
Random relative offset  
Valid version level  
Must = 1  
Not checked. Port Login Accept will return a 0—not supported.  
x
N_Port/F_Port  
Must = 0, N_Port  
Must = 1  
Alternate credit model  
Other bits reserved  
xxx XX  
FS  
PN  
Receive buffer field size. The FS field in the common and Class 3 parameters is checked for the range 128 < FS < 2,112 and a  
multiple of four bytes. For multiple frame sequences, all frames but the last frame of the sequence must be this size. Only the  
receive buffer field size in the Class 3 parameters is used.  
Port name (initiator’s)—saved with the login parameters. If a change of the port name/AL_PA address association is detected dur-  
ing a Port DISCovery, and implicit logout occurs and the initiator returns a LS_RJT.  
NN  
SO  
Node name. The node name is not checked or saved by the drive.  
Service options Class 3 only.  
MSB  
Class valid  
Must = 1  
Intermix  
x
Stacked connection req.  
Sequential delivery  
Other bits reserved  
xx  
x
xxx XX  
IC  
Initiator control  
MSB XID reassign  
xx  
Proc Assc  
Other bits  
10 or 11 causes the login to be rejected. Other values are accepted.  
XXX  
CS  
OS  
Concurrent sequences  
Must be a value greater than 0.  
Must be a value greater than 0.  
Open sequences per exchange  
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Cheetah 10K.6 FC Product Manual, Rev. B  
39  
9.1.5  
Fibre Channel port login accept  
Table 7 identifies the N_Port Login access payload values.  
Table 7:  
Bytes  
N_Port Login Accept (ACC) payload  
0-15  
02  
00  
37  
00  
00  
UI  
00  
01  
UI  
00  
F4  
UI  
20  
20  
20  
00  
00  
20  
88  
37  
00  
UI  
FS FS 00  
FF  
00  
00  
00  
01  
20  
Common  
16-31  
32-35  
36-47  
48-51  
52-63  
64-67  
68-79  
80-83  
84-95  
96-99  
100-111  
PP 00  
UI  
00  
00  
UI  
00  
00  
20  
00  
00  
00  
00  
80  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
FF  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
Class 1  
Class 2  
Class 3  
Reserved  
00  
00  
00  
00  
00  
00  
01  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
FS FS 00  
00  
00  
00  
00  
00  
00  
Vendor -  
Version  
112-115 00  
FS  
UI  
Receive buffer field size. The drive returns and uses the receive buffer size from the N_Port Login Class 3 receive  
buffer.  
Unique identifier. This 24-bit field is uniquely assigned to the drive. This same UI appears in the Port Name and  
Node Name fields.  
PP  
Port identifier field.  
01  
02  
P_LOGI received on Port A.  
P_LOGI received on Port B.  
9.1.6  
Fibre Channel Process Login  
Table 8 lists the process login payload data.  
Table 8:  
Bytes  
Process Login (PLRI) payload  
0-15  
20  
00  
10  
00  
00  
00  
14  
22  
08  
00  
20  
00  
XX XX XX XX XX XX XX XX  
16-19  
XX  
Indicates fields that are not used.  
Fibre Channel Process Login Accept  
9.1.7  
Table 9 lists Cheetah 10K.6 FC process login accept payload data.  
Table 9:  
Bytes  
Process Login Accept (ACC) payload  
0-15  
02  
00  
10  
00  
00  
00  
14  
12  
08  
00  
21  
00  
00  
00  
00  
00  
00  
00  
00  
00  
16-31  
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40  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.1.8  
Fibre Channel fabric login  
Table 10 lists the fabric login payload from the drive.  
Table 10:  
Bytes  
Fabric Login (FLOGI) payload  
0-15  
04  
00  
37  
00  
00  
UI  
00  
02  
UI  
00  
F4  
UI  
20  
20  
20  
00  
00  
20  
08  
37  
00  
UI  
08  
UI  
40  
UI  
00  
02  
00  
00  
00  
00  
00  
20  
Common  
16-31  
32-35  
36-47  
48-51  
52-63  
64-67  
68-79  
80-83  
84-95  
96-99  
100-111  
PP 00  
00  
00  
80  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
08  
00  
00  
00  
00  
40  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
Class 1  
Class 2  
Class 3  
Reserved  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
00  
Vendor -  
Version  
112-115 00  
UI  
Unique identifier. This 24-bit field is uniquely assigned to the drive. This same UI appears in the Port Name and Node Name  
fields.  
PP  
Port identifier field.  
01  
02  
FLOGI originated on Port A.  
FLOGI originated on Port B.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
41  
9.1.9  
Fibre Channel fabric accept login  
Table 10 lists the required content of the Fabric Login Accept (ACC) payload from the fabric.  
Table 11:  
Bytes  
Fabric Login Accept (ACC) payload  
0-15  
02  
E_  
00  
00  
00  
XX XX BB BB CF XX FS FS R_ A_  
T0  
V_  
Common  
16-31  
32-35  
36-47  
48-51  
52-63  
64-67  
68-79  
80-83  
84-95  
96-99  
100-111  
D_ T0  
V_  
PN PN PN PN PN PN PN PN NN NN NN NN  
NN NN NN NN  
XX XX XX XX  
XX XX XX XX  
OS OS XX XX  
XX XX XX XX  
XX XX XX XX XX XX XX XX XX XX XX XX Class 1  
XX XX XX XX XX XX XX XX XX XX XX XX Class 2  
SO SO xx  
xx  
XX XX FS FS XX xx  
XX XX Class 3  
XX XX XX XX XX XX XX XX XX XX XX XX Reserved  
XX XX XX XX XX XX XX XX XX XX XX XX Vendor -  
Version  
112-115 XX XX XX XX  
X
Indicates a four-bit (hex) field is not checked.  
x
Indicates a single bit is not checked.  
BB  
CF  
BB-Credit. This field is not checked. The FC-AL drive uses BB-Credit of zero (0).  
Common features. This binary field selects the common features requested by the fabric login.  
MSB  
Continuously increasing offset  
Random relative offset  
Valid version level  
x
x
x
N_Port/F_Port  
Must = 1, F_Port  
Must = 1  
Alternate credit model  
Other bits reserved  
xxx XX  
FS  
PN  
Receive buffer field size. The FS field in the common and Class 3 parameters is checked for the range 128 < FS < 2,112 and a  
multiple of four bytes. The receive buffer field size in the Class 3 parameters is used. The drive uses the lower FS of Fabric Login  
Accept or N_Port Login when sending frames to an initiator.  
Port Name. The fabric port name is saved with the login parameters. If a change of the port name is detected during a FAN, an  
implicit logout occurs and a LS_RJT is returned to the fabric.  
NN  
SO  
Node Name. The drive does not check or save the node name.  
Service Options—Class 3 only.  
MSB  
Class valid  
Must = 1  
x
Intermix  
Stacked connection req.  
Sequential delivery  
Other bits reserved  
xx  
Must = 1  
xxx XX  
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42  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.1.10  
Fibre Channel Arbitrated Loop options  
Table 12 lists the FC-AL options supported by Cheetah 10K.6 FC drives.  
Table 12:  
Option  
FC-AL options supported  
Supported  
OPEN Half Duplex  
OPEN Full Duplex  
Accepted from another device.  
Sent to open another device.  
Accepted from another device.  
Private Loop  
Yes  
Yes  
No  
Public Loop  
Old Port State  
Loop Position  
Loop Position Report  
Yes  
Yes  
9.2  
Dual port support  
Cheetah 10K.6 FC drives have two independent FC-AL ports. These ports may be connected on independent  
loops or on the same loop. Port A and Port B may be connected in any order or combination.  
• If both ports are connected on independent loops and hard addressing is used, the drive interface address is  
selected through the interface connector, both ports will seek the same loop address. If no conflict, both  
ports will have the same loop address.  
• If both ports are connected in the same loop and hard addressing is used, at least one port will attempt tak-  
ing a soft address to prevent an address conflict.  
Note. When a Cheetah 10K.6 FC drive is connected in loops with previous Seagate FC drive products:  
Barracuda 4LP FC (ST32171FC, ST34371FC, and ST34571FC)  
Barracuda 9FC (ST19171FC)  
Cheetah 4LP FC (ST34501FC)  
Cheetah 9FC (ST19101FC)  
the connection of Port A and B for these products must follow the requirements in their product manu-  
als.  
Subject to buffer availability, the Cheetah 10K.6 FC drives support:  
• Concurrent port transfers—The drive supports receiving transfers on both ports at the same time when the  
ports are on independent loops.  
• Full duplex—The drive supports sending FCP_Data, FCP_RSP, FCP_XFR_RDY and ELS transfers while  
receiving frames on both ports.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
43  
9.3  
SCSI commands supported  
Table 13 lists the SCSI commands supported by Cheetah 10K.6 FC drives.  
Table 13:  
Supported commands  
Command code  
Supported [4] Command name  
00h  
01h  
03h  
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
N
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Test unit ready  
Rezero unit  
Request sense  
Extended sense  
Field pointer bytes  
Actual retry count bytes  
Format unit [1]  
04h  
07h  
08h  
0Ah  
0Bh  
12h  
Reassign blocks  
Read  
Write  
Seek  
Inquiry  
Vital product data page (00h)  
Unit serial number page (80h)  
Implemented operating def. page (81h)  
IDevice identification page (83h)  
Firmware numbers page (C0h)  
Date code page (C1h)  
Jumper settings page (C2h)  
Device behavior page (C3h)  
Mode select (same pages as Mode Sense command shown below) [3]  
Reserve  
15h  
16h  
3rd party reserved  
Extent reservation  
17h  
18h  
1Ah  
Release  
Copy  
Mode sense  
Unit attention page (00h)  
Error recovery page (01h)  
Disconnect/reconnect control (page 02h)  
Format page (03h)  
Rigid disc drive geometry page (04h)  
Verify error recovery page (07h)  
Caching parameters page (08h)  
Fibre Channel interface control page (19h)  
Control mode page (0Ah)  
Power control page (1Ah)  
Information exceptions control page (1Ch)  
Start unit/stop unit  
1Bh  
1Ch  
Receive diagnostic results  
Supported diagnostics pages  
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44  
Cheetah 10K.6 FC Product Manual, Rev. B  
Table 13:  
Supported commands (continued)  
Command code  
Supported [4] Command name  
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
Y
Y
N
Y
Y
Y
Y
N
Y
Y
Y
N
N
N
N
N
N
Y
N
Y
N
N
Y
Y
Y
N
Y
N
Y
Y
Y
Y
Y
Translate page  
Enclosure services page  
Send diagnostics page  
Supported diagnostics pages  
Translate page  
Read capacity  
1Dh  
25h  
28h  
Read extended  
Disable page out  
Force unit access  
Relative address  
Write extended  
Disable page out  
Force unit access  
Relative address  
Seek extended  
Write and verify  
Disable page out  
Byte check  
2Ah  
2Bh  
2Eh  
Relative address  
Verify  
2Fh  
Disable page out  
Byte check  
Relative address  
Search data high  
Search data equal  
Search data low  
Set limits  
30h  
31h  
32h  
33h  
34h  
35h  
36h  
37h  
39h  
3Ah  
3Bh  
Prefetch  
Synchronize cache  
Lock-unlock-cache  
Read defect data  
Compare  
Copy and verify  
Write buffer  
Write combined header and data mode (0)  
Write data mode (2)  
Download microcode mode (4)  
Download microcode and save modes (5)  
Download microcode with offsets mode (6)  
Download microcode with offsets and save mode (7)  
Firmware download option [2]  
3Ch  
Read buffer  
Read combined header and data mode (0)  
Read data mode (2)  
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Cheetah 10K.6 FC Product Manual, Rev. B  
Table 13: Supported commands (continued)  
45  
Command code  
Supported [4] Command name  
Read descriptor mode (3)  
Y
Y
Y
N
Y
N
N
N
Y
Y
Y
Y
Y
N
Y
Y
Y
N
Y
Y
Y
N
N
N
N
N
Y
Y
Y
N
Y
N
Y
N
A
A
N
N
N
N
N
N
N
3Eh  
3Fh  
40h  
41h  
Read long  
Write long  
Change definition  
Write same  
PBdata  
LBdata  
42-4Bh  
4Ch  
Not used  
Log Select  
4Dh  
Log Sense  
Supported Log page (00h)  
Write Error Counter page (02h)  
Read Error Counter page (03h)  
Read Reverse Error Counter page (04h)  
Verify Error Counter page (05h)  
Non-medium Error Counter page (06h)  
Temperature page (0Dh)  
Application Client page (0Fh)  
Self Test Results page (10h)  
Cache Statistics Counter page (37h)  
Factory Log page (3Eh)  
Not used  
4E-4Fh  
50h  
XD write  
51h  
XP write  
52h  
XD read  
53-54h  
55h  
Not used  
Mode Select (10) [3]  
Reserved (10)  
56h  
3rd party reserve  
Extent reservation  
Released (10)  
57h  
58-59h  
5Ah  
Not used  
Mode Sense (10) [3]  
Not used  
5B-5Dh  
5E  
Persistent reserve in  
Persistent reserve out  
Not used  
5F  
60-7Fh  
80h  
XD write extended  
Rebuild  
81h  
82h  
Regenerate  
83-8Fh  
C0-DFh  
EO-FFh  
Not used  
Not used  
Not used  
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46  
Cheetah 10K.6 FC Product Manual, Rev. B  
[1] Cheetah 10K.6 FC drives can format to any multiple of four bytes per logical block in the range 512 to 704  
bytes.  
[2] Warning. Power loss during flash programming can result in firmware corruption. This usually makes the  
drive inoperable.  
[3] Reference Mode Sense command 1Ah for mode pages supported.  
[4] Y = Yes. Command is supported.  
N = No. Command is not supported.  
A = Support is available on special request.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
9.3.1 Inquiry data  
47  
Table 14 lists the Inquiry command data that the drive should return to the initiator per the format given in the  
Fibre Channel Interface Manual.  
Table 14:  
Bytes  
Cheetah 10K.6 FC inquiry data  
Data (hex)  
0-15  
00  
[53  
R#  
00  
00  
00  
00  
30*  
72  
00  
54  
R#  
00  
00  
00  
43  
30*  
69  
**  
12  
31  
R#  
00  
00  
00  
70  
20  
68  
8B  
34  
S#  
00  
00  
00  
79  
53  
74  
00  
36  
S#  
00  
00  
00  
72  
65  
73  
PP  
38  
S#  
00  
00  
00  
69  
61  
20  
0A  
30  
S#  
00  
00  
00  
67  
67  
72  
53  
37  
S#  
00  
00  
00  
68  
61  
65  
45  
46  
S#  
00  
00  
00  
74  
74  
73  
41  
43]  
S#  
00  
00  
00  
20  
65  
65  
47  
20  
S#  
00  
00  
00  
28  
20  
72  
41  
20  
00  
00  
00  
00  
63  
41  
76  
54  
20  
00  
00  
00  
00  
29  
6C  
65  
45  
20  
00  
00  
00  
00  
20  
6C  
64  
20  
20  
00  
00  
00  
00  
32*  
20  
20  
Vendor ID  
Product ID  
16-31  
32-47  
48-63  
64-79  
80-95  
96-111  
112-127  
128-143  
33  
R#  
00  
00  
00  
6F  
32*  
67  
*Copyright  
notice  
*
Copyright year (changes with actual year).  
**  
02 = SCSI-2 implemented with some SCSI-3 features (default).  
03 = The device complies to ANSI X3.301:199x  
PP 50 = Inquiry data for an Inquiry command received on Port A.  
70 = Inquiry data for an Inquiry command received on Port B.  
R# Four ASCII digits representing the last four digits of the product firmware release number.  
S# Eight ASCII digits representing the eight digits of the product serial number.  
[ ]  
Bytes 16 through 25 reflect drive model.  
9.3.2  
Mode Sense data  
The Mode Sense command provides a way for the drive to report its operating parameters to the initiator. The  
drive maintains four sets of mode parameters:  
1. Default values  
Default values are hard-coded in the drive firmware stored in flash E-PROM (nonvolatile memory) on the  
drive’s PCB. These default values can be changed only by downloading a complete set of new firmware  
into the flash E-PROM. An initiator can request and receive from the drive a list of default values and use  
those in a Mode Select command to set up new current and saved values, where the values are change-  
able.  
2. Saved values  
Saved values are stored on the drive’s media using a Mode Select command. Only parameter values that  
are allowed to be changed can be changed by this method. Parameters in the saved values list that are not  
changeable by the Mode Select command get their values from default values storage.  
When power is applied to the drive, it takes saved values from the media and stores them as current values  
in volatile memory. It is not possible to change the current values (or the saved values) with a Mode Select  
command before the drive achieves operating speed and is “ready.” An attempt to do so results in a “Check  
Condition” status.  
On drives requiring unique saved values, the required unique saved values are stored into the saved val-  
ues storage location on the media prior to shipping the drive. Some drives may have unique firmware with  
unique default values also.  
On standard OEM drives, the saved values are taken from the default values list and stored into the saved  
values storage location on the media prior to shipping.  
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48  
Cheetah 10K.6 FC Product Manual, Rev. B  
3. Current values  
Current values are volatile values being used by the drive to control its operation. A Mode Select command  
can be used to change the values identified as changeable values. Originally, current values are installed  
from saved or default values after a power on reset, hard reset, Target Reset, or LIP Reset.  
4. Changeable values  
Changeable values form a bit mask, stored in nonvolatile memory, that dictates which of the current values  
and saved values can be changed by a Mode Select command. A one (1) indicates the value can be  
changed. A zero (0) indicates the value is not changeable. For example, in Table 15, refer to Mode page  
81, in the row entitled “CHG.These are hex numbers representing the changeable values for Mode page  
81. Note in columns 5 and 6 (bytes 04 and 05), there is 00h which indicates that in bytes 04 and 05 none of  
the bits are changeable. Note also that bytes 06, 07, 09, 10, and 11 are not changeable, because those  
fields are all zeros. In byte 02, hex value FF equates to the binary pattern 11111111. If there is a zero in  
any bit position in the field, it means that bit is not changeable. Since all of the bits in byte 02 are ones, all  
of these bits are changeable.  
The changeable values list can only be changed by downloading new firmware into the flash E-PROM.  
Note. Because there are often several different versions of drive control firmware in the total population of  
drives in the field, the Mode Sense values given in the following tables may not exactly match those of  
some drives.  
The following tables list the values of the data bytes returned by the drive in response to the Mode Sense com-  
mand pages for SCSI implementation (see the Fibre Channel Interface Manual).  
Definitions:  
DEF = Default value. Standard OEM drives are shipped configured this way.  
CHG = Changeable bits; indicates if default value is changeable.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
49  
Table 15:  
Mode Sense data default and changeable values for ST3146807FC drives  
ST3146807FC  
Bytes  
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23  
Mode  
00 ab 00 10 00 00 00 08 11 17 73 30 00 00 02 00  
Sense  
Header  
<-----------------------------Mode Page 10 Byte Header Data and Parameter Data Bytes--------------------------->  
81 0a c0 0b ff 00 00 00 05 00 ff ff  
DEF  
CHG  
81 0a ff ff 00 00 00 00 ff 00 ff ff  
DEF  
82 0e 80 80 00 00 00 00 00 00 01 b4 00 00 00 00  
82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00  
CHG  
DEF  
83 16 46 a0 00 00 00 20 00 00 02 d0 02 00 00 01 00 66 00 66 40 00 00 00  
83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG  
DEF  
84 16 00 c2 bf 08 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00  
84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG  
DEF  
87 0a 00 0b ff 00 00 00 00 00 ff ff  
87 0a 0f ff 00 00 00 00 00 00 ff ff  
CHG  
DEF  
88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00  
88 12 b5 00 00 00 ff ff ff ff 00 00 a0 ff 00 00 00 00 00 00  
CHG  
DEF  
8a 0a 02 00 00 00 00 00 00 00 0c 00  
8a 0a 03 f1 08 00 00 00 00 00 00 00  
CHG  
DEF  
99 06 00 00 00 00 00 00  
99 06 00 ff 00 00 00 00  
CHG  
DEF  
9a 0a 00 03 00 00 00 01 00 00 00 04  
9a 0a 00 03 00 00 00 00 00 00 00 00  
CHG  
DEF  
9c 0a 10 00 00 00 00 00 00 00 00 01  
9c 0a 9d 0f ff ff ff ff ff ff ff ff  
CHG  
DEF  
80 06 00 00 0f 00 00 00  
80 06 b7 40 0f 00 00 00  
CHG  
<--- Read capacity data --->  
11 17 73 2f 00 00 02 00  
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Cheetah 10K.6 FC Product Manual, Rev. B  
Mode Sense data default and changeable values for ST373307FC drives  
Table 16:  
ST373307FC  
Bytes  
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23  
Mode  
00 ab 00 10 00 00 00 08 08 8b b9 98 00 00 02 00  
Sense  
Header  
<-----------------------------Mode Page 10 Byte Header Data and Parameter Data Bytes--------------------------->  
81 0a c0 0b ff 00 00 00 05 00 ff ff  
DEF  
CHG  
81 0a ff ff 00 00 00 00 ff 00 ff ff  
DEF  
82 0e 80 80 00 00 00 00 00 00 01 b4 00 00 00 00  
82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00  
CHG  
DEF  
83 16 2a 9c 00 00 00 14 00 00 02 d1 02 00 00 01 00 90 00 66 40 00 00 00  
83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG  
DEF  
84 16 00 c2 bf 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00  
84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG  
DEF  
87 0a 00 0b ff 00 00 00 00 00 ff ff  
87 0a 0f ff 00 00 00 00 00 00 ff ff  
CHG  
DEF  
88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00  
88 12 b5 00 00 00 ff ff ff ff 00 00 a0 ff 00 00 00 00 00 00  
CHG  
DEF  
8a 0a 02 00 00 00 00 00 00 00 05 00  
8a 0a 03 f1 08 00 00 00 00 00 00 00  
CHG  
DEF  
99 06 00 00 00 00 00 00  
99 06 00 ff 00 00 00 00  
CHG  
DEF  
9a 0a 00 03 00 00 00 01 00 00 00 04  
9a 0a 00 03 00 00 00 00 00 00 00 00  
CHG  
DEF  
9c 0a 10 00 00 00 00 00 00 00 00 01  
9c 0a 9d 0f ff ff ff ff ff ff ff ff  
CHG  
DEF  
80 06 00 00 0f 00 00 00  
80 06 b7 40 0f 00 00 00  
CHG  
<--- Read capacity data --->  
08 8b b9 97 00 00 02 00  
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Cheetah 10K.6 FC Product Manual, Rev. B  
51  
Table 17:  
Mode Sense data default and changeable values for ST373307FC drives  
ST336607FC  
Bytes  
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23  
Mode  
00 ab 00 10 00 00 00 08 04 45 dc cc 00 00 02 00  
Sense  
Header  
<-----------------------------Mode Page 10 Byte Header Data and Parameter Data Bytes--------------------------->  
81 0a c0 0b ff 00 00 00 05 00 ff ff  
DEF  
CHG  
81 0a ff ff 00 00 00 00 ff 00 ff ff  
DEF  
82 0e 80 80 00 00 00 00 00 00 01 b4 00 00 00 00  
82 0e ff ff 00 00 00 00 00 00 ff ff 00 00 00 00  
CHG  
DEF  
83 16 15 4e 00 00 00 0a 00 00 02 d1 02 00 00 01 00 66 00 66 40 00 00 00  
83 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG  
DEF  
84 16 00 c2 bf 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 27 31 00 00  
84 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  
CHG  
DEF  
87 0a 00 0b ff 00 00 00 00 00 ff ff  
87 0a 0f ff 00 00 00 00 00 00 ff ff  
CHG  
DEF  
88 12 14 00 ff ff 00 00 ff ff ff ff 80 20 00 00 00 00 00 00  
88 12 b5 00 00 00 ff ff ff ff 00 00 a0 ff 00 00 00 00 00 00  
CHG  
DEF  
8a 0a 02 00 00 00 00 00 00 00 03 00  
8a 0a 03 f1 08 00 00 00 00 00 00 00  
CHG  
DEF  
99 06 00 00 00 00 00 00  
99 06 00 ff 00 00 00 00  
CHG  
DEF  
9a 0a 00 03 00 00 00 01 00 00 00 04  
9a 0a 00 03 00 00 00 00 00 00 00 00  
CHG  
DEF  
9c 0a 10 00 00 00 00 00 00 00 00 01  
9c 0a 9d 0f ff ff ff ff ff ff ff ff  
CHG  
DEF  
80 06 00 00 0f 00 00 00  
80 06 b7 40 0f 00 00 00  
CHG  
<--- Read capacity data --->  
04 45 dc cb 00 00 02 00  
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52  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.4  
Miscellaneous operating features and conditions  
Table 18 lists various features and conditions. A “Y” in the support column indicates the feature or condition is  
supported. An “N” in the support column indicates the feature or condition is not supported.  
Table 18:  
Miscellaneous features  
Feature or condition  
Supported  
Y
Y
N
N
Y
N
Y
Y
Y
Y
N
Y
FC-AL selective reset  
Automatic contingent allegiance  
Asynchronous event notification  
Synchronized (locked) spindle operation  
Segmented caching  
Zero latency read  
Queue tagging (up to 128 queue tags supported)  
Deferred error handling  
Parameter rounding (controlled by Round bit in Mode Select page 0)  
Reporting actual retry count in Extended Sense bytes 15, 16, and 17  
Adaptive caching  
SMP = 1 in Mode Select command needed to save RPL and rotational offset bytes  
Table 19:  
Miscellaneous status  
Status  
Supported  
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Good  
Check condition  
Condition met/good  
Busy  
Intermediate/good  
Intermediate/condition met/good  
Reservation conflict  
Task set full  
ACA active  
ACA active, faulted initiator  
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Cheetah 10K.6 FC Product Manual, Rev. B  
9.5 FC-AL physical interface  
53  
Figure 19 shows the location of the J1 Fibre Channel single connection attachment (FC-SCA) and the J6 con-  
nector. Figure 21 provides the dimensions of the FC-SCA. Figure 22 provides the dimensions of the J6 con-  
nector.  
Details of the physical, electrical, and logical characteristics are provided within this section. The operational  
aspects of Seagate’s Fibre Channel drives are provided in the Fibre Channel Interface Manual.  
J6  
Figure 19.  
9.5.1  
Physical interface  
Physical characteristics  
This section defines physical interface connector.  
9.5.1.1 Physical description  
FIbre Channel drives may be connected in a loop together or with other compatible FC-AL devices. A maxi-  
mum of 127 devices may have addresses; however, one of the addresses is reserved for a fabric port switch  
device. This means 126 addresses are available for FC-AL devices. More FC-AL compatible devices may  
physically reside on the loop, but they will not be functional because they would not be able to obtain valid  
addresses.  
Port bypass circuits (PBCs) allow devices to be inserted into unpopulated locations or removed from the loop  
with loop operation recovery after a brief interruption. These PBCs are located external to the FC-AL device.  
Figure 20 shows the relationship between the PBC and FC-AL device.  
Port Bypass  
Circuit  
From Previous  
Drive  
To Next  
Drive  
Port Bypass  
Circuit N–1  
Port Bypass  
Circuit N+1  
MUX  
Select  
Serial  
In  
Serial  
Out  
Drive N–1  
Drive N+1  
Drive N  
Figure 20.  
Port bypass circuit physical interconnect  
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54  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.5.2  
Connector requirements  
Recommended mating SCA part number:  
Part description  
Positions  
Part number  
787317-1  
Features  
AMP Vertical (SCA sequence)  
40  
40  
40  
40  
With polarization  
With polarization  
With polarization  
With polarization  
Berg  
71781  
Methode  
Molex  
512-220-91-101N  
717431040  
The FC-AL SCA device connector is illustrated in Figure 21. The J6 connector is illustrated in Figure 22.  
1.618 .003 in  
(41.1 0.08 mm)  
Pin 20  
Pin 40  
Pin 1  
0.197 .003 in  
(5.00 .08 mm)  
2 places  
Pin 21  
.64 in  
(16.24 mm)  
1.28 in  
(32.47 mm)  
0.394 .004 in  
(10.0 0.10 mm)  
1.618 .003 in  
(41.10 0.08 mm)  
0.226 in  
(6.50 mm)  
0.039 in  
min.  
min.  
(0.75 mm)  
0.264+.007 in  
–.010 in  
1.492 .009 in  
(37.90 0.24 mm)  
0.024 in  
(0.60 mm)  
min.  
(6.71+0.18 mm)  
(–0.25 mm)  
Mating end  
Housing  
0.079 .010 in  
(2.00 .25 mm)  
(initial point  
of contact)  
.05 in  
(1.27 mm)  
Contact (typ.)  
.025 in (0.635 mm)  
typ.  
0.060 .010 in  
(1.52 0.25 mm)  
0.106 .010 in  
(2.70 0.25 mm)  
0.051 .006 in  
(1.30 0.16 mm)  
2 places  
Figure 21.  
FC-AL SCA device connector dimensions  
.787  
(19.99 mm)  
.079 (2 mm)  
J6  
.079  
(2 mm)  
.708  
(17.983 mm)  
Figure 22.  
J6 connector dimensions  
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Cheetah 10K.6 FC Product Manual, Rev. B  
9.5.3 Electrical description  
55  
Fibre Channel drives use the FC-SCA connector for:  
• DC power  
• FC-AL interface  
• Drive select (device identification)  
• Option selection  
• Enclosure Services interface  
This 40-pin connector is designed to plug directly into a backpanel. External cables are not required.  
9.5.4  
Pin descriptions  
This section provides a pin-out of the FC-SCA and a description of the functions provided by the pins.  
Table 20:  
FC-SCA pin descriptions  
Signal name Signal type  
Pin  
Pin  
Signal name  
Signal type  
1*  
-EN bypass port A  
Low Voltage  
TTL output  
21  
12 Volts charge  
2*  
12 Volts  
22  
Ground  
3*  
12 Volts  
23  
Ground  
4*  
12 Volts  
24*  
25*  
26  
+Port A_in  
-Port A_in  
Ground  
Diff. PECL input pair  
Diff. PECL input pair  
5*  
-Parallel ESI  
[1]  
6*  
Ground  
7*  
Active LED out  
Reserved  
Open collector out  
27*  
28*  
29  
+Port B_in  
-Port B_in  
Ground  
8*  
9*  
TTL input  
TTL input  
10*  
11*  
Start_2 [2]  
30*  
31*  
+Port A_out  
-Port A_out  
Diff PECL output pair  
Diff PECL output pair  
-EN bypass port B  
Low Voltage  
TTL output  
12*  
13*  
14*  
15*  
16*  
17*  
SEL_6  
TTL input/output  
TTL input/output  
TTL input  
32  
Ground  
SEL_5  
33*  
34*  
35  
+Port B_out  
-Port B_out  
Ground  
SEL_4  
SEL_3  
TTL input/output  
Open collector out  
TTL input  
Fault LED out  
36  
SEL_2  
TTL input/output  
TTL input/output  
DEV_CTRL_CODE_2  
37  
SEL_1  
18*  
DEV_CTRL_CODE_1  
TTL input  
38  
SEL_0  
TTL input/output  
19*  
20*  
5 Volts  
5 Volts  
39  
40  
DEV_CTRL_CODE_0 [2] TTL input  
5 Volts charge  
*Short pins in mating backpanel connector.  
[1] This pin may be connected to external logic to detect the presence of the drive. The drive connects this  
pin to the common ground.  
[2] Pins 9, 10, 17, 18, and 39 are option select pins and are tied high by the drive circuitry. The preferred elec-  
trical connection at the backplane is either open or grounded (open for the ‘1’ setting, grounded for the ‘0’  
setting). Alternatively, these pins may be driven by a 3.3V logic device, pulled up to 3.3V through a pull-up  
resistor (recommended size of 10K ohm), or grounded through some other means.  
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56  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.5.5  
FC-AL transmitters and receivers  
A typical FC-AL differential copper transmitter and receiver pair is shown in Figure 23. The receiver is required  
to provide the AC coupling to eliminate ground shift noise.  
68  
150  
68  
.01  
TX  
Transmitter  
TY  
RX  
Receiver  
RY  
Differential  
Transfer Medium  
150  
.01  
150  
Figure 23.  
9.5.6  
FC-AL transmitters and receivers  
Power  
Power is supplied through the FC-SCA with support for +5 volts and +12 volts. All of the voltage pins in the  
drive connector are the same length.  
Four 12 volt pins provide +12 volt power to the drive. The current return for the +12 volt power supply is through  
the common ground pins. The supply current and return current must be distributed as evenly as possible  
among the pins. The maximum current typically occurs while the drive motor is starting.  
Three 5 volt pins provide logic power to the drive. The current return for the +5 volt power supply is through the  
common ground pins. Distribute supply and return current as evenly as possible among the voltage and ground  
pins.  
The mating connector pins use shorter contacts to achieve power surge reductions and to aid in “hot plugging”  
the drives. There are longer voltage contacts in the connector to enable the drive filter capacitors to charge.  
Current to the drive through the long charge pins is limited by the system in which the drive operates. Three of  
the +12 volt pins are shorter to allow capacitive pre-charging through the longer +12 volt charge pin. Two of the  
+5 volt pins are shorter to allow capacitive precharging through the longer +5 volt charge pin.  
9.5.7  
Fault LED Out  
The Fault LED Out signal is driven by the drive when:  
• the drive detects failure of both ports  
• the drive detects an internal failure  
• the drive receives the appropriate fault LED command from the host  
The Fault LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper  
+5 volt supply through an appropriate current-limiting resistor. The LED and the current-limiting resistor are  
external to the drive.  
9.5.8  
Active LED Out  
The Active LED Out signal is driven by the drive as indicated in Table 21.  
Table 21:  
Active LED Out conditions  
Normal command activity  
LED status  
Spun down and no activity  
Slow blink (20% on and 80% off a 2 sec cycle)  
Spun down and activity (command executing)  
Spun up and no activity  
On  
On  
Spun up and activity (command executing)  
Spinning up or down  
Off  
Blinks steadily (50% on and 50% off)  
Toggles on/off  
Format in progress, each cylinder change  
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Cheetah 10K.6 FC Product Manual, Rev. B  
57  
The Active LED Out signal is designed to pull down the cathode of an LED. The anode is attached to the proper  
+5 volt supply through an appropriate current limiting resistor. The LED and the current limiting resistor are  
external to the drive.  
9.5.9  
Enable port bypass signals  
The – Enable Bypass Port A (– EN BYP Port A) and – Enable Bypass Port B (– EN BYP Port B) signals control  
the port bypass circuits (PBC) located external to the disc drive. The PBC allows a loop to remain functional in  
the event of a drive failure or removal. When these signals are active, low, the PBC bypasses the drive on the  
associated port. When an Enable Bypass signal is active, the corresponding Port Bypass LED signal in con-  
nector J1 is driven low by the disc drive. A pull down resistor, 1K, located with the PBC should be used to  
insure the bypass is enabled if the disc drive is not installed.  
The Enable Bypass signal is active under failing conditions within the drive, on detection of the Loop Port  
Bypass primitive sequence, or on removal of the drive. In the bypass state the drive continues to receive on the  
inbound fibre. Enable Bypass may be deactivated by detection of a Loop Port Enable primitive sequence if the  
drive has completed self-test and a hardware failure is not present.  
Failure modes detected by the disc drive that will enable bypass include:  
Transmitter/receiver wrap test failure  
• Loss of receive clock  
• Loss of transmission clock  
• Drive interface hardware error  
9.5.10  
Motor start controls  
The drive’s motor is started according to the Start_1 and Start_2 signals described in Table 22. The state of  
these signals can be wired into the backplane socket or driven by logic on the backplane.  
Table 22:  
Case  
Motor start control signals  
Start_2  
Start_1  
Motor spin function  
1
2
3
Low  
High  
Low  
Low  
Low  
High  
Motor spins up at DC power on.  
Motor spins up only when SCSI Start command is received.  
Motor spins up after a delay of 12 seconds times the modulo 8 value of  
the numeric SEL ID of the drive from DC power on.  
4
High  
High  
The drive will not spin up.  
9.5.11  
SEL_6 through SEL_0 ID lines  
The SEL_6 through SEL_0 ID lines determine drive address, and, optionally, for an Enclosure Services Inter-  
face. When the Parallel ESI line is high, the enclosure backpanel must provide address information on the SEL  
line. Refer to table 23 for a mapping of SEL to FC-AL physical addresses (AL_PA). You can think of the SEL  
lines as the equivalent of a backpanel logic plug. The drives does not provide pull up resistors on these lines.  
The backpanel is required to provide high and low inputs to the SEL_ID lines per the specifications in table 25  
Note. Table 23 gives AL_PA values for each SEL value. The first entry in the table is SEL_ID 00. The last  
entry is SEL_ID 7D. SEL_ID 7E is AL_PA 00 which is not valid for an NL_Port, so is not included in the  
table. Also, SEL_ID 7Fh does map to a valid AL_PA; however, this value signals the drive that physical  
addresses are not being assigned using the SEL lines and that a “soft” address will be determined by  
FC-AL loop initialization.  
When the Parallel ESI line is low, the enclosure backpanel logic switches to ESI mode if supported. There are  
two modes of ESI, seven bits of enclosure status and a bidirectional mode. ESI support and the mode are  
determined by the drive using a discovery process. Refer to the Fibre Channel Interface Manual for a descrip-  
tion of ESI operation.  
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58  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.5.11.1  
Parallel Enclosure Services Interface (ESI)  
The parallel ESI line is an output from the drive. This line provides the enclosure with an indication of the  
present function of the SEL lines. A high level, the default state, indicates the drive requires address informa-  
tion on the SEL lines. A low level indicates the drive is attempting an ESI transfer. The enclosure may not sup-  
port ESI on any or all drive locations. It may only support the address function. Support of ESI is discovered by  
the drive. Refer to the Fibre Channel Interface Manual for a description of ESI operations.  
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Cheetah 10K.6 FC Product Manual, Rev. B  
59  
Table 23:  
Arbitrated loop physical address (AL_PA) values  
AL_PA  
(hex)  
SEL ID  
(hex)  
Setting  
(dec)  
AL_PA  
(hex)  
SEL ID  
(hex)  
Setting  
(dec)  
AL_PA  
(hex)  
SEL ID  
(hex)  
Setting  
(dec)  
EF  
E8  
E4  
E2  
E1  
E0  
DC  
DA  
D9  
D6  
D5  
D4  
D3  
D2  
D1  
CE  
CD  
CC  
CB  
CA  
C9  
C7  
C6  
C5  
C3  
BC  
BA  
B9  
B6  
B5  
B4  
B3  
B2  
B1  
AE  
AD  
AC  
AB  
AA  
A9  
A7  
A6  
A5  
00  
01  
02  
03  
04  
05  
06  
07  
08  
09  
0A  
0B  
0C  
0D  
0E  
0F  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
1A  
1B  
1C  
1D  
1E  
1F  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
2A  
00  
01  
02  
03  
04  
05  
06  
07  
08  
09  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
A3  
9F  
9E  
9D  
9B  
98  
97  
90  
8F  
88  
84  
82  
81  
80  
7C  
7A  
79  
76  
75  
74  
73  
72  
71  
6E  
6D  
6C  
6B  
6A  
69  
67  
66  
65  
63  
5C  
5A  
59  
56  
55  
54  
53  
52  
51  
4E  
2B  
2C  
2D  
2E  
2F  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
3A  
3B  
3C  
3D  
3E  
3F  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
4A  
4B  
4C  
4D  
4E  
4F  
50  
51  
52  
53  
54  
55  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
71  
72  
73  
74  
75  
76  
77  
78  
79  
80  
81  
82  
83  
84  
85  
4D  
4C  
4B  
4A  
49  
47  
46  
45  
43  
3c  
3A  
39  
36  
35  
34  
33  
32  
31  
2E  
2D  
2C  
2B  
2A  
29  
27  
26  
25  
23  
1F  
1E  
1D  
1B  
18  
17  
10  
0F  
08  
04  
02  
01  
56  
57  
58  
59  
5A  
5B  
5C  
5D  
5E  
5F  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
6A  
6B  
6C  
6D  
6E  
6F  
70  
71  
72  
73  
74  
75  
76  
77  
78  
79  
7A  
7B  
7C  
7D  
86  
87  
88  
89  
90  
91  
92  
93  
94  
95  
96  
97  
98  
99  
100  
101  
102  
103  
104  
105  
106  
107  
108  
109  
110  
111  
112  
113  
114  
115  
116  
117  
118  
119  
120  
121  
122  
123  
124  
125  
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60  
Cheetah 10K.6 FC Product Manual, Rev. B  
9.5.12  
Device control codes  
The drive inputs a Device Control Code on the DEV_CTRL_CODE lines at power up to determine the link rate  
on the Fibre Channel ports. Both ports run at the same rate. If the backpanel does not connect to these lines,  
the drive has 10K ohm pull up resistors that default the device control code to 7 (1.0625 GHz). Table 24 lists the  
supported codes.  
Table 24:  
Device control code values  
2 (pin 17) 1 (pin 18) 0 (pin 39) Definition  
0
0
0
0
1
1
1
1
0
1
0
1
0
1
0
1
Reserved for Power failure warning.  
Reserved for auto negotiation of link rate.  
Reserved.  
0
0
1
1
0
0
1
1
Reserved.  
Reserved.  
Reserved.  
2.125 GHz operation on both ports.  
1.0625 GHz operation on both ports.  
9.6  
Signal characteristics  
This section describes the electrical signal characteristics of the drive’s input and output signals. See Table 20  
on page 55 for signal type and signal name information.  
9.6.1  
TTL input characteristics  
Table 25 provides the TTL characteristics.  
Table 25:  
State  
TTL characteristics  
Voltage  
Current  
Input high  
Input low  
1.9 < VIH < 5.5V  
-0.5V < VIL < 0.9V  
2.4 < VOH < 5.25V  
VOL < 0.5V  
IIH = 500nA max.  
IOL = 500nA max.  
IOH < -3mA  
Output high (-EN Bypass A, B)  
Output low (-EN Bypass A, B)  
Output high (-Parallel ESI)  
IOL < 3mA  
2.4 < VOH < 0.9 VCC  
VOH > 0.9VCC  
IOH < -2.4mA  
I
OH < -500µA  
Output low (-Parallel ESI)  
0 < VOL < .45V  
IOL < 2.4mA  
IOH < -1.6mA  
Output high (all other outputs)  
2.4 < VOH < 0.9 VCC  
VOH > 0.9VCC  
I
OH < -500µA  
Output low (all other outputs)  
0 < VOL < .45V  
IOL < 1.6mA  
9.6.2  
LED driver signals  
Fault and Active LED signals are located in the FC-SCA connector (J1) and through the indicator connector  
(J6). See Table 26 for the output characteristics of the LED drive signals.  
Table 26:  
State  
LED drive signal  
Current drive available  
Output voltage  
LED off, high  
LED on, low  
0 < IOH < 100µA  
IOL < -30 mA  
0 < VOL < 0.8V  
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Cheetah 10K.6 FC Product Manual, Rev. B  
9.6.3 Differential PECL output  
61  
The serial PECL output signal voltage characteristics are provided in Table 27. The outputs are not AC coupled  
in order to deliver maximum signal without rise and fall time degradation. You must AC couple the receiver to  
isolate potentially different DC characteristics of the outputs and the receiver.  
Table 27:  
Differential PECL output characteristics  
Parameter  
Description  
Serial output voltage swing  
600 < Vout < 1300 mV  
Figure 24 provides the data output valid eye diagram relative to the bit cell time. Table 29 lists the data values.  
Bit Time  
XMIT Eye  
Figure 24.  
9.6.4  
Transmit eye diagram  
Differential PECL input  
The serial PECL input signal voltage characteristics are provided in Table 28.  
Table 28:  
Differential PECL input characteristics  
Parameter  
Description  
Notes  
Serial input voltage swing  
400 < Vin < 2.000 mV  
AC coupled  
Figure 25 provides the data valid eye diagram for typical and minimum requirements to recover data at the  
specified interface error rate. The inputs are AC coupled on the drive. Table 29 lists the data values.  
Bit Time  
RCV Eye  
(typical)  
(minimum)  
Figure 25.  
Receive eye diagram  
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62  
Cheetah 10K.6 FC Product Manual, Rev. B  
Table 29:  
Eye diagram data values  
Link rate  
1 GHz  
2 GHz  
Bit time  
941 ps  
470 ps  
XMIT eye  
725 ps min.  
315 ps min.  
305 ps  
Typical  
659 ps  
395 ps  
RCV eye  
Minimum  
226 ps  
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Cheetah 10K.6 FC Product Manual, Rev. B  
63  
10.0  
Seagate Technology support services  
Online Services  
Internet  
www.seagate.com for information about Seagate products and services. Worldwide support is available 24  
hours daily by e-mail for your disc or tape questions.  
Presales Support:  
Technical Support:  
Reseller Marketplace  
Reseller Marketplace is the storage industry’s first collaborative, e-commerce marketplace offering resellers  
the fastest, most efficient online purchasing process for Seagate storage solutions. The Reseller Marketplace  
at marketplace.seagate.com, an exclusive service for US resellers participating in the Seagate Partner Pro-  
gram (SPP), is designed to streamline the purchasing process of Seagate solutions and provide unprece-  
dented value to Seagate’s resellers through real-time pricing and availability, fast and easy comparison  
shopping, and seamless integration with key distributors for a one-stop shopping experience.  
For support, questions and comments: reseller.seagate.com/benefits/T1.html or 1-877-271-3285 (toll-free)  
9 A.M. to 7 P.M. (eastern time) Monday through Friday.  
Tape Purchases  
US customers can purchase Seagate data cartridges, tape supplies, accessories, and select Seagate tape  
drive products 24 hours daily at buytape.seagate.com.  
Automated Services  
SeaFONE® (1-800-SEAGATE) is Seagate’s toll-free number (1-800-732-4283) to access our automated self-  
help services. Using a touch-tone phone, you can find answers to service phone numbers, commonly asked  
questions, troubleshooting tips and specifications for disc drives and tape drives 24 hours daily. International  
callers can reach this service by dialing +1-405-936-1234.  
SeaFAX® (1-800-SEAGATE) is Seagate’s automated FAX delivery system. Using a touch-tone phone, you can  
obtain technical support information by return FAX 24 hours daily.  
Presales Support  
Presales Support  
Our Presales Support staff can help you determine which Seagate products are best suited for your specific  
application or computer system.  
Technical Support  
If you need help installing your drive, consult your dealer. Dealers are familiar with their unique system configu-  
rations and can help you with system conflicts and other technical issues. If you need additional help, you can  
talk to a Seagate technical support specialist. Before calling, note your system configuration and drive model  
number (ST####).  
SeaTDD™ (+1-405-936-1687) is a telecommunications device for the deaf (TDD). You can send questions or  
comments 24 hours daily and exchange messages with a technical support specialist from 8:00 A.M. to  
11:45 A.M. and 1:00 P.M. to 6:00 P.M. (central time) Monday through Friday.  
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64  
Cheetah 10K.6 FC Product Manual, Rev. B  
Customer Service (CSO)  
Warranty Service  
Seagate offers worldwide customer support for Seagate drives. Seagate direct OEM, Distribution and System  
Integrator customers should contact their Seagate service center representative for warranty information.  
Other customers should contact their place of purchase.  
Authorized Service Centers  
If you live outside the US, you can contact an Authorized Service Center for service.  
USA/Canada/Latin America Support Services  
Presales Support  
Call Center  
Disc:  
Toll-free  
Direct dial  
FAX  
1-877-271-3285  
+405-936-1210  
+1-405-936-1683  
Tape:  
1-800-626-6637  
+1-714-641-2500  
+1-714-641-2410  
Technical Support (SeaFONE)  
1-800-SEAGATE or +1-405-936-1234 (for specific product phone number)  
FAX: Disc: +1-405-936-1685; Tape and Server Appliance: +1-405-936-1683  
SeaFAX  
SeaTDD  
1-800-SEAGATE  
+1-405-936-1687  
Warranty Service  
Call Center  
Toll-free  
Direct dial  
FAX / Internet  
USA, Mexico and  
1-800-468-3472  
+1-405-936-1456  
+1-405-936-1462  
Latin America  
Canada  
Memofix1  
1-800-636-6349  
1-800-624-9857  
+1-905-660-4936  
+1-905-890-3099  
+1-905-660-4951  
Adtech*  
+1-905-812-3977  
Brazil  
MA Centro de Serviços*  
+55-21-2509-7267  
+55-21-2507-6672  
European Support Services  
For European customer support, dial the toll-free number for your specific country for presales support, techni-  
cal support, SeaFAX and warranty service.  
If your country is not listed here, dial our European call center at +31-20-316-7222 from 8:30 A.M. to 5:00 P.M.  
(European central time) Monday through Friday. The European call center is located in Amsterdam, The Neth-  
erlands.  
Call Center  
Austria  
0 800-20 12 90  
0 800-74 876  
80 88 12 66  
0 800-90 90 52  
0 800-182 6831  
1 800-55 21 22  
800-790695  
Belgium  
Denmark  
France  
Germany  
Ireland  
Italy  
Netherlands  
Norway  
Poland  
0 800-732 4283  
800-113 91  
00 800-311 12 38  
1. Authorized Service Centers  
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65  
Spain  
900-98 31 24  
Sweden  
0 207 90 073  
Switzerland  
Turkey  
United Kingdom  
0 800-83 84 11  
00 800-31 92 91 40  
0 800-783 5177  
FAX Services—All European Countries  
Presales/Technical Support/Warranty Service 31-20-653-3513  
Africa/Middle East Support Services  
For presales, technical support, warranty service and FAX services in Africa and the Middle East, dial our  
European call center at +31-20-316-7222 from 8:30 A.M. to 5:00 P.M. (European central time) Monday through  
Friday, or send a FAX to +31-20-653-3513. The European call center is located in Amsterdam, The Nether-  
lands.  
Asia/Pacific Support Services  
For Asia/Pacific presales and technical support, dial the toll-free number for your specific country. The Asia/  
Pacific toll-free numbers are available from 6:00 A.M. to 10:45 A.M. and 12:00 P.M. to 6:00 P.M. (Australian east-  
ern time) Monday through Friday. If your country is not listed here, direct dial one of our technical support loca-  
tions.  
Call Center  
Australia  
China  
Toll-free  
1800-14-7201  
Direct dial  
FAX  
+86-10-6871-4316  
Hong Kong  
800-90-0474  
1-600-33-1104  
001-803-1-003-2165  
+852-2368 7173  
India1  
Indonesia  
Japan  
+81-3-5462-2978  
Malaysia  
New Zealand  
Singapore  
Taiwan  
1-800-80-2335  
0800-443988  
800-1101-150  
+65-6488-7525  
+886-2-2715-2923  
+886-2-2514-2237  
Thailand  
001-800-11-0032165  
Warranty Service  
Call Center  
Asia/Pacific  
Toll-free  
1800-12-9277  
Direct dial  
+65-6485-3595  
FAX  
+65-6485-4860  
Australia  
1. Authorized Service Center  
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66  
Cheetah 10K.6 FC Product Manual, Rev. B  
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Cheetah 10K.6 FC Product Manual, Rev. B  
67  
Index  
Numerics  
12 volt  
C
capacity  
A
ANSI documents  
connector  
auto write and read reallocation  
B
D
data block size  
data heads  
data rate  
buffer  
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68  
Cheetah 10K.6 FC Product Manual, Rev. B  
environmental  
error  
error correction code  
extended link service  
Disconnect/reconnect control (page 02h) command  
F
FC-AL  
Download microcode with offsets and save mode (7)  
FCP  
E
electrical  
enable bypass  
FLOGI  
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Cheetah 10K.6 FC Product Manual, Rev. B  
69  
J
function  
L
latency  
G
H
hard assigned arbitrated loop physical address  
heads  
loop position  
loop position report  
I
Information exceptions control page (1Ch) command  
M
miscellaneous feature support  
miscellaneous status support  
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70  
Cheetah 10K.6 FC Product Manual, Rev. B  
overhead time  
P
P_LOGI  
Mode select  
Mode sense  
motor start  
performance characteristics  
N
noise  
O
old port state  
OPEN Full Duplex  
OPEN half duplex  
private loop  
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Cheetah 10K.6 FC Product Manual, Rev. B  
71  
public loop  
S
SCSI interface  
Search data  
Q
seek error  
R
receive eye  
seek time  
service  
reference  
signal  
Rigid disc drive geometry page  
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72  
Cheetah 10K.6 FC Product Manual, Rev. B  
surface stiffness  
synchronized spindle  
W
T
X
Z
See also cooling  
U
unrecoverable  
V
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Seagate Technology LLC  
920 Disc Drive, Scotts Valley, California 95066-4544, USA  
Publication Number: 100195490, Rev. B, Printed in USA  
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