Seagate Computer Drive ST32112A User Manual

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U4 Family  
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ST32112A, ST34311A  
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ST36421A, ST38421A  
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Ultra ATA Interface Drives  
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Product Manual  
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U4 Family  
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ST32112A, ST34311A  
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ST36421A, ST38421A  
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Ultra ATA Interface Drives  
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Product Manual  
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1999 Seagate Technology, Inc. All rights reserved  
Publication Number: SG35116-001, Rev. D, June 1999  
Seagate, Seagate Technology, the Seagate logo and U4 are either  
trademarks or registered trademarks of Seagate Technology, Inc. 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 publication may be reproduced in any  
form without written permission from Seagate Technology, Inc.  
U4 Family Product Manual, Rev. D  
iii  
Contents  
Specification summary table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
1.0 Drive specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
1.1 Formatted capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
1.1.1 Default logical geometry . . . . . . . . . . . . . . . . . . . . . . . . . 5  
1.2 Physical organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5  
1.3 Recording and interface technology . . . . . . . . . . . . . . . . . . . . 6  
1.4 Physical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
1.5 Seek time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6  
1.6 Start/stop times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
1.7 Power specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
1.7.1 Power consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7  
1.7.2 Conducted noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
1.7.3 Voltage tolerance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10  
1.7.4 Power-management modes . . . . . . . . . . . . . . . . . . . . . 10  
1.8 Environmental tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
1.8.1 Ambient temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
1.8.2 Temperature gradient . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
1.8.3 Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11  
1.8.4 Altitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
1.8.5 Shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
1.8.6 Vibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12  
1.9 Drive acoustics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13  
1.10 Electromagnetic susceptibility . . . . . . . . . . . . . . . . . . . . . . . 14  
1.11 Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
1.12 Agency certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
1.12.1 Safety certification . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14  
1.12.2 Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . 14  
1.12.3 FCC verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15  
iv  
U4 Family Product Manual, Rev. D  
2.0 Configuring and mounting the drive . . . . . . . . . . . . . . . . . . . 17  
2.1 Handling and static-discharge precautions . . . . . . . . . . . . . . 17  
2.2 Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18  
2.2.1 Master/slave configuration . . . . . . . . . . . . . . . . . . . . . . 18  
2.2.2 Cable-select option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
2.3 Ultra ATA/66 cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
2.4 Drive mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19  
3.0 ATA interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21  
3.1 ATA interface signals and connector pins . . . . . . . . . . . . . . 21  
3.2 ATA Interface commands . . . . . . . . . . . . . . . . . . . . . . . . . . . 23  
3.2.1 Supported ATA commands . . . . . . . . . . . . . . . . . . . . . . 23  
3.2.2 Identify Drive command . . . . . . . . . . . . . . . . . . . . . . . . 24  
3.2.3 Set Features command . . . . . . . . . . . . . . . . . . . . . . . . . 29  
3.2.4 S.M.A.R.T. commands . . . . . . . . . . . . . . . . . . . . . . . . . 30  
U4 Family Product Manual, Rev. D  
v
Figures  
Figure 1. Typical startup and operation current profile . . . . . . . . . . . . 9  
Figure 2. Master/slave jumper settings . . . . . . . . . . . . . . . . . . . . . . . 18  
Figure 3. Mounting dimensions—top, side and end view . . . . . . . . . 20  
Figure 4. I/O pins and supported ATA signals. . . . . . . . . . . . . . . . . . 22  
vi  
U4 Family Product Manual, Rev. D.  
U4 Family Product Manual, Rev. D  
1
Introduction  
This manual describes the functional, mechanical and interface specifi-  
cations for the U4 ST38421A, ST36421A, ST34311A and the  
ST32112A. These drives provide the following key features:  
Low power consumption  
Quiet operation  
10-5 msec seek time, 5-400-RPM and 256-Kbyte buffer for excellent  
desktop performance  
High instantaneous (burst) data-transfer rates (up to 66.6 Mbytes per  
second) using Ultra DMA mode 4  
300 Gs nonoperating shock  
Full-track multiple-sector transfer capability without local processor  
intervention  
State-of-the-art cache and on-the-fly error-correction algorithms  
MR recording heads and EPRML technology, which provide the drives  
with increased areal density  
Support for S.M.A.R.T. drive monitoring and reporting  
Support for Read Multiple and Write Multiple commands  
Support for autodetection of master/slave drives that use cable select  
(CSEL)  
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U4 Family Product Manual, Rev. D  
Specification summary table  
The specifications listed in this table are for quick reference. For details  
on specification measurement or definition, see the appropriate section  
of this manual.  
ST32112A  
ST34311A  
ST36421A  
ST38421A  
Drive Specification  
Guaranteed Mbytes  
6
(×10 bytes)  
2,160  
4,320  
6,448  
8,440  
Guaranteed sectors  
Bytes per sector  
4,225,536 8,452,080 12,596,850 16,498,944  
512  
63  
Default sectors per track  
Default read/write heads  
Default cylinders  
16  
15  
15  
16  
4,192  
8,944  
13,330  
16,368  
Physical read/write  
heads  
1
1
2
1
3
2
4
2
Discs  
Recording density  
BPI (bits/inch max)  
241,000  
Track density  
TPI (tracks/inch)  
13,100  
Areal density  
2
(Mbits/inch max)  
3,179  
5,400  
Spindle speed (RPM)  
Internal data-transfer  
rate (Mbits/sec max)  
206  
I/O data-transfer rate  
(Mbytes/sec max)  
66.6  
ATA data-transfer modes  
supported  
PIO modes 0–4  
Multiword DMA modes 0–2  
Ultra DMA modes 0–4  
Cache buffer (Kbytes)  
Height (mm max)  
Width (mm max)  
Length (mm max)  
Weight (typical)  
256  
26.1  
102  
147.0  
580 grams (1.2 lb)  
U4 Family Product Manual, Rev. D  
3
ST32112A  
ST34311A  
ST36421A  
ST38421A  
Drive Specification  
Track-to-track seek time  
(msec typical)  
2.0 (read), 2.75 (write)  
10.5 (read), 11.5 (write)  
Averageseektime(msec  
typical)  
Full-stroke seek time  
(msec typical)  
24.0 (read), 26.0 (write)  
5.56 msec  
Average latency (msec)  
Power-on to ready  
(sec typical)  
8 sec  
7 sec  
Standby to ready  
(sec typical)  
Startup current (typical):  
12V (peak)  
1.5 amps  
Seek power (typical)  
Idle mode (typical)  
7.0 watts  
3.1 watts  
0.8 watts  
0.8 watts  
Standby mode (typical)  
Sleep mode (typical)  
Voltage tolerance  
(including noise)  
5V ± 5%, 12V ± 10%  
Ambient temperature  
0° to 55°C (op.), –40° to 70°C (nonop.)  
Temperature gradient  
(°C per hour max)  
20°C  
Relative humidity  
(op. and nonop.)  
5% to 90% (op.)  
5% to 95% (nonop.)  
Relative humidity  
gradient  
30% per hour max  
Wet bulb temperature  
(°C max)  
29.4 (op.), 40.0 (nonop.)  
Altitude, operating  
–61 m to 3,048 m (–200 ft to 10,000+ ft)  
–122 m to 12,192 m (–400 ft to 40,000+ ft)  
Altitude, nonoperating  
Shock (Gs at 2 msec)  
operating  
nonoperating  
63 Gs  
300 Gs  
Vibration, operating  
0.5 Gs (0 to peak, 5–350 Hz)  
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U4 Family Product Manual, Rev. D  
ST32112A  
ST34311A  
ST36421A  
ST38421A  
Drive Specification  
Vibration, nonoperating  
5 Gs (0 to peak, 5–350 Hz)  
Drive acoustics  
Sound power  
3.3 (typical), 3.7(max)  
3.9 (typical), 4.3 (max)  
Idle mode  
Seek mode  
Nonrecoverable read  
errors  
13  
1 per 10 bits read  
Mean time between  
failures (power-on hours)  
400,000  
50,000  
5
Contact start-stop cycles  
(25°C, 40% relative  
humidity)  
Service life (years)  
U4 Family Product Manual, Rev. D  
5
1.0 Drive specifications  
Unless otherwise noted, all specifications are measured under ambient  
conditions, at 25°C, and nominal power. For convenience, the phrases  
the drive and this drive are used throughout this manual to indicate the  
U4 ST38421A, ST36421A, ST34311A and the ST32112A.  
1.1 Formatted capacity  
Guaranteed Mbytes  
(1 Mbyte = 106 bytes)  
Guaranteed  
sectors  
Bytes per  
sector  
Drive Model  
ST38421A  
ST36421A  
ST34311A  
ST32112A  
8,440  
6,448  
4,320  
2,160  
16,498,944  
12,596,850  
8,452,080  
4,225,536  
512  
512  
512  
512  
1.1.1 Default logical geometry  
CHS Mode  
ST38421A  
ST36421A  
ST34311A  
ST32112A  
Cylinders  
16,368  
13,330  
8,944  
Read/Write heads  
Sectors per track  
16  
15  
15  
16  
63  
63  
63  
63  
4,192  
LBA Mode  
When addressing either drive in LBA mode, all blocks (sectors) are  
consecutively numbered from 0 to n–1, where n is the number of  
guaranteed sectors as defined above.  
1.2 Physical organization  
Drive Model  
ST38421A  
ST36421A  
ST34311A  
ST32112A  
Read/Write heads (MR)  
Number of discs  
4
3
2
1
2
2
1
1
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U4 Family Product Manual, Rev. D  
1.3 Recording and interface technology  
Interface  
ATA  
Recording method  
16/17 EPRML  
241,000  
13,100  
3,179  
Recording density BPI (bits/inch)  
Track density TPI (tracks/inch)  
Areal density (Mbits/inch2 max)  
Spindle speed (RPM) (± 0.2%)  
5,400  
Internal data-transfer rate  
(Mbits/sec max)  
206  
I/O data-transfer rate  
(Mbytes /sec max)  
16.6 (PIO mode 4)  
66.6 (Ultra DMA mode 4)  
Interleave  
1:1  
Cache buffer (Kbytes)  
256  
1.4 Physical characteristics  
Drive Specification  
ST38421A, ST36421A,  
ST34311A, ST32112A  
Maximum height (mm)  
(inches)  
26.1  
1.028  
Maximum width (mm)  
(inches)  
101.8  
4.020  
Maximum length (mm)  
(inches)  
147.0  
5.78  
Typical weight  
(grams)  
(pounds)  
580  
1.2  
1.5 Seek time  
Seek measurements are taken with nominal power at 25°C ambient  
temperature. All times are measured using drive diagnostics. The spec-  
ifications in the table below are defined as follows:  
Track-to-track seek time is an average of all possible single-track  
seeks in both directions.  
U4 Family Product Manual, Rev. D  
7
Average seek time is a true statistical random average of at least 5,000  
measurements of seeks between random tracks, less overhead.  
Full-stroke seek time is one-half the time needed to seek from the first  
data cylinder to the maximum data cylinder and back to the first data  
cylinder. The full-stroke typical value is determined by averaging 100  
full-stroke seeks in both directions.  
Typical seek times (msec)  
Track-to-track  
Read  
2.0  
Write  
2.75  
11.5  
26.0  
Average  
10.5  
24.0  
Full-stroke  
Average latency: 5.56 msec  
Note. These drives are designed to consistently meet the seek times rep-  
resented in this manual. Physical seeks, regardless of mode (such as  
track-to-track and average) are expected to meet or exceed the noted  
values. However, due to the manner in which these drives are format-  
ted, benchmark tests that include command overhead or measure  
logical seeks may produce results that vary from these specifications.  
1.6 Start/stop times  
Power-on to Ready (sec)  
Standby to Ready (sec)  
Ready to spindle stop (sec)  
8 (typical)  
7 (typical)  
10 (typical)  
1.7 Power specifications  
The drive receives DC power (+5V or +12V) through a four-pin standard  
drive power connector.  
1.7.1 Power consumption  
Power requirements for the drives are listed in the table on page 9.  
Typical power measurements are based on an average of drives tested,  
under nominal conditions, using 5.0V input voltage at 25°C ambient  
temperature.  
Spinup power  
Spinup power is measured from the time of power-on to the time that  
the drive spindle reaches operating speed.  
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U4 Family Product Manual, Rev. D  
Seek Mode  
During seek mode, the read/write actuator arm moves toward a  
specific position on the disc surface and does not execute a read or  
write operation. Servo electronics are active. Seek mode power rep-  
resents the worst-case power consumption, using only random seeks  
with read or write latency time. This mode is not typical and is provided  
for worst-case information.  
Read/Write power and current  
Read/write power is measured with the heads on track, based on a  
16-sector write followed by a 32-msec delay, then a 16-sector read  
followed by a 32-msec delay.  
Operating power and current  
Operating power is measured using 40 percent random seeks, 40  
percent read/write mode (1 write for each 10 reads) and 20 percent  
drive inactive.  
Idle mode power  
Idle mode power is measured with the drive up to speed, with servo  
electronics active and with the heads in a random track location.  
Standby mode  
During Standby mode, the drive accepts commands, but the drive is  
not spinning, and the servo and read/write electronics are in power-  
down mode.  
U4 Family Product Manual, Rev. D  
9
Typical Amps RMS  
Power Mode  
Typical Watts  
5V  
12V  
RMS  
Spinup  
1.5 (peak)  
Seek (Random, no  
read/write)  
7.0  
5.7  
3.1  
0.8  
0.39  
0.34  
0.24  
0.14  
0.42  
0.33  
0.16  
0.01  
Operating  
Idle  
Standby/Sleep  
1.7.1.1 Typical current profile  
Figure 1 shows a typical current profile.  
Current (amps)  
1.2  
1.0  
0.8  
0.6  
0.4  
0.2  
0
1
2
3
4
5
6
7
8
Time (seconds)  
Figure 1. Typical startup and operation current profile  
10  
U4 Family Product Manual, Rev. D  
1.7.2 Conducted noise  
Input noise ripple is measured at the host system power supply across  
an equivalent 80-ohm resistive load on the +12 volt line or an equivalent  
15-ohm resistive load on the +5 volt line.  
Using 12-volt power, the drive is expected to operate with a maximum  
of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.  
Using 5-volt power the drive is expected to operate with a maximum  
of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.  
Note. Equivalent resistance is calculated by dividing the nominal volt-  
age by the typical RMS read/write current.  
1.7.3 Voltage tolerance  
Voltage tolerance (including noise): 5V ± 5% and 12V ± 10%  
1.7.4 Power-management modes  
The drive provides programmable power management to provide great-  
er energy efficiency. In most systems, you can control power manage-  
ment through the system setup program. The drive features the following  
power-management modes:  
Power Mode  
Active  
Heads  
Spindle  
Rotating  
Rotating  
Stopped  
Stopped  
Buffer  
Tracking  
Tracking  
Parked  
Parked  
Enabled  
Enabled  
Enabled  
Disabled  
Idle  
Standby  
Sleep  
Active mode  
The drive is in Active mode during the read/write and seek operations.  
Idle mode  
The buffer remains enabled, and the drive accepts all commands and  
returns to Active mode any time disc access is necessary.  
Standby mode  
The drive enters Standby mode when the host sends a Standby  
Immediate command. If the host has set the standby timer, the drive  
can also enter Standby mode automatically after the drive has been  
inactive for a specifiable length of time. The standby timer delay is  
established using a Standby or Idle command. In Standby mode, the  
U4 Family Product Manual, Rev. D  
11  
drive buffer is enabled, the heads are parked and the spindle is at rest.  
The drive accepts all commands and returns to Active mode any time  
disc access is necessary.  
Sleep mode  
The drive enters Sleep mode after receiving a Sleep command from  
the host. In Sleep mode, the drive buffer is disabled, the heads are  
parked and the spindle is at rest. The drive leaves Sleep mode after  
it receives a Hard Reset or Soft Reset from the host. After receiving a  
reset, the drive exits Sleep mode and enters Active mode with all  
current translation parameters intact.  
Idle and Standby timers  
Each time the drive performs an Active function (read, write or seek),  
the standby timer is reinitialized and begins counting down from its  
specified delay times to zero. If the standby timer reaches zero before  
any drive activity is required, the drive makes a transition to Standby  
mode. In both Idle and Standby mode, the drive accepts all commands  
and returns to Active mode when disc access is necessary.  
1.8 Environmental tolerances  
1.8.1 Ambient temperature  
Operating  
0° to 55°C (32° to 131°F)  
Nonoperating  
–40° to 70°C (–40° to 158°F)  
Note. Above 1,000 feet (305 meters), the maximum temperature is  
derated linearly to 112°F (44°C) at 10,000 feet (3,048 meters).  
Operating ambient temperature is defined as the temperature of  
the environment immediately surrounding the drive.  
1.8.2 Temperature gradient  
Operating/Nonoperating 20°C/hr (36°F/hour) max, without condensation  
1.8.3 Humidity  
1.8.3.1 Relative Humidity  
Operating  
5% to 90% noncondensing (30% per hour max)  
Nonoperating  
5% to 95% noncondensing (30% per hour max)  
12  
U4 Family Product Manual, Rev. D  
1.8.3.2 Wet bulb temperature  
Operating  
29.4°C (84°F) max  
Nonoperating  
40.0°C (104°F) max  
1.8.4 Altitude  
Operating  
–61 m to 3,048 m (–200 ft to 10,000+ ft)  
–122 m to 12,192 m (–400 ft to 40,000+ ft)  
Nonoperating  
1.8.5 Shock  
All shock specifications assume that the drive is mounted securely with  
the input shock applied at the drive mounting screws. Shock may be  
applied in the X, Y or Z axis.  
1.8.5.1 Operating shock  
These drives comply with the performance levels specified in this docu-  
ment when subjected to a maximum operating shock of 63 Gs (based  
on half-sine shock pulses of 2 msec. Shocks should not be repeated  
more than two times per second.  
1.8.5.2 Nonoperating shock  
The nonoperating shock level that the drive can experience without  
incurring physical damage or degradation in performance when subse-  
quently put into operation is 75 Gs (based on a nonrepetitive half-sine  
shock pulse of 11 msec duration) or 300 Gs (based on a nonrepetitive  
half-sine shock pulse of 2 msec duration).  
1.8.6 Vibration  
All vibration specifications assume that the drive is mounted securely  
with the input vibration applied at the drive mounting screws. Vibration  
may be applied in the X, Y or Z axis.  
U4 Family Product Manual, Rev. D  
13  
1.8.6.1 Operating vibration  
The following table lists the maximum vibration levels that the drive may expe-  
rience while meeting the performance standards specified in this document.  
5–21 Hz  
0.02-inch displacement (peak to peak)  
0.5 Gs acceleration (zero to peak)  
0.3 Gs acceleration (zero to peak)  
22–350 Hz  
351–500 Hz  
1.8.6.2 Nonoperating vibration  
The following table lists the maximum nonoperating vibration that the  
drive may experience without incurring physical damage or degradation  
in performance when subsequently put into operation.  
5–21Hz  
0.02-inch displacement (peak to peak)  
5.0 Gs acceleration (zero to peak)  
2.0 Gs acceleration (zero to peak)  
22–350 Hz  
351–500 Hz  
1.9 Drive acoustics  
Drive acoustics are measured as overall A-weighted acoustic sound  
power levels (no pure tones). All measurements are generally consistent  
with ISO document 7779. Sound power measurements were taken  
under essentially free-field conditions over a reflecting plane. For all  
tests, the drive was oriented with the cover facing upward.  
Note. For seek mode tests, the drive was placed in seek mode only.  
The number of seeks per second is defined by the following  
equation: (Number of seeks per second = 0.4 / (average latency + average  
access time)  
Acoustic mode  
Idle mode  
Seek mode  
Sound power (bels)  
3.3 (typ) 3.7 (max)  
3.9 (typ) 4.3 (max)  
14  
U4 Family Product Manual, Rev. D  
1.10 Electromagnetic susceptibility  
The drive operates without errors when subjected to the following:  
Radiated noise  
3 volt/meter, 30 Hz to 500 MHz  
10 KVolts  
Electrostatic discharge*  
Magnetic field strength  
5 Gauss  
* Electrostatic discharge susceptibility is measured with the drive  
mounted in a representative computer system (mounted to a  
ground plane with an earth ground). Discharges are applied to the  
bezel or other external surfaces on the ground plane.  
1.11 Reliability  
Nonrecoverable read errors  
1 per 10-13 bits read, max  
Mean time between failures  
400,000 power-on hours  
(nominal power, 25°C ambient tem-  
perature)  
Contact start-stop cycles  
Preventive maintenance  
50,000 cycles  
(atnominalvoltageandtemperature,  
with 60 cycles per hour and a 50%  
duty cycle)  
None required  
1.12 Agency certification  
1.12.1 Safety certification  
The drives are recognized in accordance with UL 1950 and CSA C22.2  
(950) and meet all applicable sections of IEC950 and EN 60950 as tested  
by TUV North America.  
1.12.2 Electromagnetic compatibility  
Hard drives that display the CE marking comply with European Union  
requirements specified in Electromagnetic Compatibility Directives.  
Testing is performed to standards EN50082-1 and EN55022-B.  
Seagate uses an independent laboratory to confirm compliance with the  
EC directives specified in the previous paragraph. Drives are tested in  
representative end-user systems. Although CE-marked Seagate drives  
U4 Family Product Manual, Rev. D  
15  
comply with the directives when used in the test systems, we cannot  
guarantee that all systems will comply with the directives. The drive is  
designed for operation inside a properly designed enclosure, with prop-  
erly shielded I/O cable (if necessary) and terminators on all unused I/O  
ports. Computer manufacturers and system integrators should confirm  
EMC compliance and provide CE marking for their products.  
Australian C-Tick  
If these models have the C-Tick marking, they comply with the Australia/  
New Zealand Standard AS/NZS3548 1995 and meet the Electromag-  
netic Compatibility (EMC) Framework requirements of Australia’s Spec-  
trum Management Agency (SMA).  
1.12.3 FCC verification  
These drives are intended to be contained solely within a personal  
computer or similar enclosure (not attached as an external device). As  
such, each drive is considered to be a subassembly even when it is  
individually marketed to the customer. As a subassembly, no Federal  
Communications Commission verification or certification of the device is  
required.  
Seagate Technology, Inc. has tested this device in enclosures as de-  
scribed above to ensure that the total assembly (enclosure, disc drive,  
motherboard, power supply, etc.) does comply with the limits for a Class  
B computing device, pursuant to Subpart J, Part 15 of the FCC rules.  
Operation with noncertified assemblies is likely to result in interference  
to radio and television reception.  
Radio and television interference. This equipment generates and  
uses radio frequency energy and if not installed and used in strict  
accordance with the manufacturer’s instructions, may cause interfer-  
ence to radio and television reception.  
This equipment is designed to provide reasonable protection against  
such interference in a residential installation. However, there is no  
guarantee that interference will not occur in a particular installation. If  
this equipment does cause interference to radio or television, which can  
be determined by turning the equipment on and off, you are encouraged  
to try one or more of the following corrective measures:  
Reorient the receiving antenna.  
Move the device to one side or the other of the radio or TV.  
Move the device farther away from the radio or TV.  
Plug the computer into a different outlet so that the receiver and  
computer are on different branch outlets.  
16  
U4 Family Product Manual, Rev. D  
If necessary, you should consult your dealer or an experienced radio/  
television technician for additional suggestions. You may find helpful the  
following booklet prepared by the Federal Communications Commis-  
sion: How to Identify and Resolve Radio-Television Interference Prob-  
lems. This booklet is available from the Superintendent of Documents,  
U.S. Government Printing Office, Washington, DC 20402. Refer to pub-  
lication number 004-000-00345-4.  
U4 Family Product Manual, Rev. D  
17  
2.0 Configuring and mounting the drive  
This section contains the specifications and instructions for configuring  
and mounting the drive.  
2.1 Handling and static-discharge precautions  
After unpacking, and before installation, the drive may be exposed to  
potential handling and electrostatic discharge (ESD) hazards. Observe the  
following standard handling and static-discharge precautions:  
Caution:  
Keep the drive in its static-shielded bag until you are ready to complete  
the installation. Do not attach any cables to the drive while it is in its  
static-shielded bag.  
Before handling the drive, put on a grounded wrist strap, or ground  
yourself frequently by touching the metal chassis of a computer that  
is plugged into a grounded outlet. Wear a grounded wrist strap  
throughout the entire installation procedure.  
Handle the drive by its edges or frame only.  
The drive is extremely fragile—handle it with care. Do not press down  
on the drive top cover.  
Always rest the drive on a padded, antistatic surface until you mount  
it in the computer.  
Do not touch the connector pins or the printed circuit board.  
Do not remove the factory-installed labels from the drive or cover them  
with additional labels. Removal voids the warranty. Some factory-  
installed labels contain information needed to service the drive. Other  
labels are used to seal out dirt and contamination.  
18  
U4 Family Product Manual, Rev. D  
2.2 Jumper settings  
2.2.1 Master/slave configuration  
The options jumper block (J8) shown in Figure 2 is used to configure the  
drive for operation. It is the 6-pin dual header between the I/O connector  
and the power connector. Use the following settings to configure the  
drive as a master or a slave.  
Master or single drive. The drive is configured at the factory for a master  
or single-drive operation with a jumper set on pins 7 and 8.  
Drive is slave. Remove the jumper to configure the drive as a slave.  
Drive is master with a non-ATA-compatible slave. Set a jumper on  
pins 5 and 6 and a jumper on pins 7 and 8. Use this jumper setting only  
if the drive does not work as a master with a jumper set on pins 7 and 8.  
Options jumper block (J8)  
Master or single drive  
Drive is slave  
Master with a non-ATA-  
compatible slave  
Cable select  
7 5 3 1  
8 6 4  
2
Figure 2. Master/slave jumper settings  
U4 Family Product Manual, Rev. D  
19  
2.2.2 Cable-select option  
Computers that use cable-select determine the master and slave drives  
by selecting or deselecting pin 28, CSEL, on the interface bus. Master  
and slave drives are determined by their physical position on the cable.  
To enable cable select, set a jumper on pins 5 and 6 as shown in Figure  
2 on page 18. Consult your computer manual to determine whether your  
computer supports this option.  
2.3 Ultra ATA/66 cable  
An 80-conductor 40-pin cable is required to run Ultra DMA mode 3 and  
4. This cable uses even-numbered conductors connected to the ground  
pins to improve signal integrity.  
Note. The drive supports both host and drive cable detection. The host  
detects the 80-conductor cable by sampling pin 34, CBLID–, on  
the interface bus. The drive detects the 80-conductor cable by  
sensing a capacitor at the host side through the CBLID– signal.  
The result is reported in a Fast Rise Detected bit (bit 13 of word  
93 in the Identify drive parameter block).  
2.4 Drive mounting  
You can mount the drive in any orientation using four screws in the side-  
mounting holes or four screws in the bottom-mounting holes. See Figure  
4 for drive mounting dimensions.  
Important mounting precautions:  
Allow a minimum clearance of 0.030 inches (0.76 mm) around the  
entire perimeter of the drive for cooling.  
Use only 6-32 UNC mounting screws.  
The screws should be inserted no more than 0.200 inch (5.58 mm) into  
the bottom mounting holes and no more than 0.14 inch (5.0 mm) into  
the side mounting holes.  
Do not overtighten the mounting screws (maximum torque: 6 inch-lb).  
Do not use a drive interface cable that is more than 18 inches long.  
20  
U4 Family Product Manual, Rev. D  
Note: Dimensions are shown in inches (mm).  
0.180 ± 0.015  
(4.57 ± 0.38)  
1.00 ± 0.028  
(25.4 ± 0.7)  
0.230 ± 0.015  
(5.84 ± 0.38  
)
2.23 ± 0.03  
(56.6 ± 0.8  
)
3X 6-32 UNC-2B  
max. insertion depth  
0.14 (3.6) both sides  
3.72 ± 0.03  
(94.5 ± 0.8  
)
4X 6-32 UNC-2B  
max. insertion  
depth 0.22 (5.6)  
4.000  
101.60  
±
0.010  
0.25  
(
±
)
1.750  
(44.45  
±
0.010  
25)  
±
0.  
5.75  
146.1  
±
0.03  
0.8  
(
±
)
2.362  
±
0.010  
0.25  
(59.99  
±
)
2.375 +0.030, –0.005  
(60.33 +0.76, –0.13)  
0.630 +0.030, –0.005  
(16.00 +0.76, –0.13)  
3.750  
(95.25  
±
0.010  
25)  
±
0.  
4.00  
(101.6  
±
0.02  
5)  
0.125 +0.030, –0.005  
(3.18 +0.76, –0.13)  
3X.250 ± .015  
(6.35 0.38)  
(both sides)  
±
0
.
±
Figure 3. Mounting dimensions—top, side and end view  
U4 Family Product Manual, Rev. D  
21  
3.0 ATA interface  
These drives use the industry-standard ATA task file interface that  
supports 16-bit data transfers. It supports ATA programmed input/output  
(PIO) modes 0–4; multiword DMA modes 0–2, and Ultra DMA modes  
0–4. The drive also supports the use of the IORDY signal to provide  
reliable high-speed data transfers.  
You can use a daisy-chain cable to connect two drives to a single AT  
host bus. For detailed information about the ATA interface, refer to the  
draft of AT Attachment with Packet Interface Extension (ATA/ATAPI-4),  
NCITS T13 1153D, subsequently referred to as the Draft ATA-4 Stan-  
dard.  
3.1 ATA interface signals and connector pins  
Figure 4 on page 22 summarizes the signals on the ATA interface  
connector that the drive supports. For a detailed description of these  
signals, refer to the Draft ATA-4 Standard.  
22  
U4 Family Product Manual, Rev. D  
Drive pin #  
Host pin # and signal description  
Signal name  
1
2
Reset  
1
2
3
4
5
6
7
8
9
Hardware Reset  
Ground  
DD7  
Ground  
3
Host Data Bus Bit 7  
Host Data Bus Bit 8  
Host Data Bus Bit 6  
Host Data Bus Bit 9  
Host Data Bus Bit 5  
Host Data Bus Bit 10  
Host Data Bus Bit 4  
4
DD8  
5
DD6  
6
DD9  
7
DD5  
8
DD10  
DD4  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
DD11  
DD3  
10 Host Data Bus Bit 11  
11 Host Data Bus Bit 3  
12 Host Data Bus Bit 12  
13 Host Data Bus Bit 2  
14 Host Data Bus Bit 13  
15 Host Data Bus Bit 1  
16 Host Data Bus Bit 14  
17 Host Data Bus Bit 0  
18 Device Data (15:0)  
19 Ground  
DD12  
DD2  
DD13  
DD1  
DD14  
DD0  
DD15  
Ground  
(removed)  
DMARQ  
Ground  
DIOW–  
STOP  
Ground  
(No Pin)  
20  
21 DMA Request  
22 Ground  
23 Device I/O Write:  
Stop Ultra DMA Burst  
24 Ground  
24  
25  
DIOR  
25 Device I/O Read:  
Host Ultra DMA Ready:  
Host Ultra DMA Data Strobe  
26 Ground  
27 I/O Channel Ready  
Device Ultra DMA Ready  
Device Ulta DMA Data Strobe  
28 Cable Select  
29 DMA Acknowledge  
30 Ground  
31 Device Interrupt  
32 Reserved  
33 Host Address Bus Bit 1  
34 Passed Diagnostics  
Cable Assembly Type Identifier  
35 Device Address (2:0)  
36 Device Address (2:0)  
37 Chip Select (1:0)  
38 Chip Select (1:0)  
39 Drive Active/Slave Present  
40 Ground  
HDMARDY  
HSTROBE  
Ground  
26  
27  
IORDY  
DDMARDY–  
DSTROBE  
CSEL  
28  
29  
30  
31  
32  
33  
34  
DMACK  
Ground  
INTRQ  
IOCS16  
DA1  
PDIAG  
CBLID–  
35  
36  
37  
38  
39  
40  
DA0  
DA2  
CS0  
CS1  
DASP  
Ground  
Pins 28, 34 and 39 are used for master-slave communication (details shown below).  
Drive 1 (slave)  
Drive 0 (master)  
Host  
28  
34  
39  
28  
34  
39  
CSEL  
28  
34  
39  
PDIAG  
DASP–  
Figure 4. I/O pins and supported ATA signals  
U4 Family Product Manual, Rev. D  
23  
3.2 ATA Interface commands  
3.2.1 Supported ATA commands  
The following table lists ATA-standard commands that the drive sup-  
ports. For a detailed description of the ATA commands, refer to the Draft  
ATA-4 Standard. See Section 3.2.4 on page 30 for details and subcom-  
mands used in the S.M.A.R.T. implementation.  
Command name  
ATA-standard commands  
Download Microcode  
Command code (in hex)  
92H  
90H  
Execute Device Diagnostics  
Flush Cache  
E7H  
Format Track  
Identify Device  
Initialize Device Parameters  
Read Buffer  
50H  
ECH  
91H  
E4H  
Read DMA  
C8H, C9H  
C4H  
Read Multiple  
Read Sectors  
Read Verify Sectors  
Recalibrate  
20H, 21H  
40H, 41H  
10H  
Seek  
70H  
Set Features  
EFH  
Set Multiple Mode  
S.M.A.R.T.  
C6H  
B0H  
Write Buffer  
E8H  
Write DMA  
CAH, CBH  
C5H  
Write Multiple  
24  
U4 Family Product Manual, Rev. D  
Command name  
Write Sectors  
Command code (in hex)  
30H, 31H  
ATA-standard power-management commands  
Check Power Mode  
Idle  
98H or E5H  
97H or E3H  
95H or E1H  
99H or E6H  
96H or E2H  
94H or E0H  
Idle Immediate  
Sleep  
Standby  
Standby Immediate  
ATA-standard security commands  
Security Set Password  
Security Unlock  
F1H  
F2H  
F3H  
F4H  
F5H  
F6H  
Security Erase Prepare  
Security Erase Unit  
Security Freeze Lock  
Security Disable Password  
3.2.2 Identify Drive command  
The Identify Drive command (command code ECH) transfers information  
about the drive to the host following power up. The data is organized as  
a single 512-byte block of data, whose contents are shown in the table  
below. All reserved bits or words should be set to zero. Parameters listed  
with an “x” are drive-specific or vary with the state of the drive. See  
Section 1 of this manual for default parameter settings.  
The following commands contain drive-specific features that may not be  
included in the Draft ATA-4 Standard.  
U4 Family Product Manual, Rev. D  
25  
Word  
Description  
Value  
Configuration information:  
Bit 15: 0 = ATA; 1 = ATAPI  
Bit 7: removable media  
Bit 6: removable controller  
Bit 0: reserved  
0C5A  
H
0
1060  
H
(ST32112A)  
22F0  
(ST34311A)  
1
Number of logical cylinders:  
H
ST32112A = 4,192  
ST34311A = 8,944  
ST36421A = 13,330  
ST38421A = 16,368  
3412  
H
(ST36421A)  
3FF0  
H
(ST38421A)  
0000  
2
3
ATA-reserved  
H
10  
Number of logical heads:  
H
(ST32112A)  
(ST38421A)  
ST32112A = 16  
ST34311A = 15  
ST36421A = 15  
ST38421A = 16  
0F  
H
(ST34311A)  
(ST36421A)  
0000  
4
5
6
Retired  
Retired  
H
0000  
H
Number of logical sectors per logical  
track: 63  
003F  
H
0000  
7–9  
Retired  
H
10–19  
Serial number: (20 ASCII characters,  
0000H = none)  
ASCII  
0000  
20  
21  
Retired  
Retired  
Obsolete  
H
0200  
H
0004  
22  
H
23–26  
Firmware revision (8 ASCII character  
string, padded with blanks to end of  
string)  
x.xx  
26  
U4 Family Product Manual, Rev. D  
Word  
Description  
Value  
ST32112A  
ST34311A  
ST36421A  
ST38421A  
27–46  
Drive model number: (40 ASCII char-  
acters, padded with blanks to end of  
string)  
47  
(Bits 7–0) Maximum sectors per inter-  
rupt on Read multiple and Write mul-  
tiple (16)  
8010  
H
0000  
48  
49  
Reserved  
H
2F00  
Standard Standby timer, IORDY  
supported and may be disabled  
H
0000  
50  
51  
52  
53  
54  
55  
56  
ATA-reserved  
H
0200  
PIO data-transfer cycle timing mode  
Retired  
H
0200  
H
0007  
Words 54–58, 64–70 and 88 are valid  
Number of current logical cylinders  
Number of current logical heads  
H
xxxx  
H
xxxx  
H
Number of current logical sectors per  
logical track  
xxxx  
H
xxxx  
57–58  
59  
Current capacity in sectors  
H
Number of sectors transferred during  
a Read Multiple or Write Multiple  
command  
xxxx  
H
7A00 0040  
60–61  
Total number of user-addressable  
LBA sectors available:  
H
H
(ST32112A)  
F7F0 0080  
H
H
ST32112A = 4,225,536  
ST34311A = 8,452,080  
ST36421A = 12,596,850  
ST38421A = 16,498,944  
(ST34311A)  
3672 00C0  
H
H
(ST36421A)  
C100 00FB  
H
H
(ST38421A)  
0000  
62  
Retired  
H
U4 Family Product Manual, Rev. D  
27  
Word  
Description  
Value  
xx07  
63  
Multiword DMA active and modes  
supported (see note following this  
table)  
H
0003  
64  
65  
66  
Advanced PIO modes supported  
(modes 3 and 4 supported)  
H
0078  
Minimum multiword DMA transfer  
cycle time per word (120 nsec)  
H
0078  
Recommended multiword DMA  
transfer cycle time per word (120  
nsec)  
H
00F0  
67  
68  
Minimum PIO cycle time without  
IORDY flow control (240 nsec)  
H
Minimum PIO cycle time with IORDY  
flow control (120 nsec)  
0078  
H
0000  
69–74  
75  
ATA-reserved  
H
0000  
Queue depth  
H
0000  
76–79  
80  
ATA-reserved  
H
001E  
Major version number  
Minor version number  
Command sets supported  
Command sets supported  
Command sets support extension  
Command sets enabled  
Command sets enabled  
Command sets enable extension  
H
0000  
81  
H
346B  
82  
H
4001  
83  
H
4000  
84  
H
xxxx  
85  
H
xxxx  
86  
H
xxxx  
87  
H
001F  
88  
Ultra DMA support and current mode  
(see note following this table)  
H
0000  
89  
90  
Security erase time  
H
0000  
Enhanced security erase time  
H
28  
U4 Family Product Manual, Rev. D  
Word  
91–92  
93  
Description  
Value  
0000  
ATA-reserved  
H
4000  
Hardware Reset Value  
H
(see description following this table)  
0000  
94–127 ATA-reserved  
128 Security Status  
H
0001  
H
xxxx  
129–159 Seagate-reserved  
160–255 ATA-reserved  
H
0000  
H
Note. See the bit descriptions below for words, 63, 88, and 93 of the  
Identify Drive data:  
Description (if bit is set to 1)  
Bit Word 63  
0
Multiword DMA mode 0 is supported.  
Multiword DMA mode 1 is supported.  
Multiword DMA mode 2 is supported.  
Multiword DMA mode 0 is currently active.  
Multiword DMA mode 1 is currently active.  
Multiword DMA mode 2 is currently active.  
1
2
8
9
10  
Bit Word 88  
0
Ultra DMA mode 0 is supported.  
1
Ultra DMA mode 1 is supported.  
Ultra DMA mode 2 is supported.  
Ultra DMA mode 3 is supported.  
Ultra DMA mode 4 is supported.  
Ultra DMA mode 0 is currently active.  
Ultra DMA mode 1 is currently active.  
Ultra DMA mode 2 is currently active.  
2
3
4
8
9
10  
U4 Family Product Manual, Rev. D  
29  
11  
12  
Ultra DMA mode 3 is currently active.  
Ultra DMA mode 4 is currently active.  
Bit Word 93  
13 1=80-conductor cable detected, CBLID above VIH  
0=40-conductor cable detected, CBLID below VIL  
3.2.3 Set Features command  
This command controls the implementation of various features that the  
drive supports. When the drive receives this command, it sets BSY,  
checks the contents of the Features register, clears BSY and generates  
an interrupt. If the value in the register does not represent a feature that  
the drive supports, the command is aborted. Power-on default has the  
read look-ahead and write caching features enabled. The acceptable  
values for the Features register are defined as follows:  
02H  
03H  
Enable write cache (default).  
Set transfer mode (based on value in Sector Count register).  
Sector Count register values:  
00H Set PIO mode to default (PIO mode 2).  
01H Set PIO mode to default and disable IORDY(PIOmode 2).  
08H PIO mode 0  
09H PIO mode 1  
0AH PIO mode 2  
0BH PIO mode 3  
0CH PIO mode 4 (default)  
20H Multiword DMA mode 0  
21H Multiword DMA mode 1  
22H Multiword DMA mode 2  
40H Ultra DMA mode 0  
41H Ultra DMA mode 1  
42H Ultra DMA mode 2  
43H Ultra DMA mode 3  
44H Ultra DMA mode 4  
30  
U4 Family Product Manual, Rev. D  
55H  
Disable read look-ahead (read cache) feature.  
82H  
Disable write cache.  
AAH  
Enable read look-ahead (read cache) feature (default).  
Note. At power-on, or after a hardware or software reset, the default  
values of the features are as indicated above.  
3.2.4 S.M.A.R.T. commands  
S.M.A.R.T. provides near-term failure prediction for disc drives. When  
S.M.A.R.T. is enabled, the drive monitors predetermined drive attributes  
thataresusceptibletodegradationovertime. Ifself-monitoringdetermines  
that a failure is likely, S.M.A.R.T. makes a status report available to the  
host. Not all failures are predictable. S.M.A.R.T. predictability is limited to  
the attributes the drive can monitor. For more information on S.M.A.R.T.  
commands and implementation, see the Draft ATA-4 Standard.  
This drive is shipped with S.M.A.R.T. features disabled. You must have  
a recent BIOS or software package that supports S.M.A.R.T. to enable  
this feature. The table below shows the S.M.A.R.T. command codes that  
the drive uses.  
Code in Features  
Register  
S.M.A.R.T. Command  
D0H  
S.M.A.R.T. Read Data  
D1H  
Vendor-specific  
D2H  
S.M.A.R.T. Enable/Disable Attribute Autosave  
S.M.A.R.T. Save Attribute Values  
S.M.A.R.T. Execute Off-line Immediate  
Vendor-specific  
D3H  
D4H  
D7H  
D8H  
S.M.A.R.T. Enable Operations  
S.M.A.R.T. Disable Operations  
S.M.A.R.T. Return Status  
D9H  
DAH  
Note. If an appropriate code is not written to the Features Register, the  
command is aborted and 0x04 (abort) is written to the Error  
register.  
U4 Family Product Manual, Rev. D  
31  
32  
U4 Family Product Manual, Rev. D  
Seagate Technology, Inc.  
920 Disc Drive, Scotts Valley, California 95066, USA  
Publication Number: SG35116-001, Rev. D, Printed in USA  

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