DC-315 Series
PCI SCSI Host Adapters
User’s Manual
Manual Rev: 3.00
Date: Jan. 99
Model
Protocol
Mode
SCSI
Max Xfer
Max
Number
Width
Rate (MB/S)
Devices
DC-315
SCSI-3
SCSI-3
SE
SE
8-bit
8-bit
20
20
7
7
DC-315U
U: Ultra SCSI (Narrow)
* All other product names are trademarks or copyrights of their respective owners.
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DC-315 Series User’s Manual
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2.1 Board Layout
The following figures illustrate the jumper and connector locations for the DC-315 Series
PCI SCSI Host Adapters:
DC-315
Ultra SCSI-3 adapter
DC-315U
Ultra SCSI-3 adapter
3
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2.2 Setting the Jumpers
DC-315U:
JP1 (LED)
SCSI Device Activity LED Indicator (JP1)
JP1 is used to indicate activity of the SCSI devices controlled by the DC-315U adapter, and
should be connected to the cable leading to the Hard Drive LED on the front panel of your
computer case.
2.3 Setting the SCSI IDs
Each SCSI device attached to the SCSI card, as well as the card itself, must be assigned a
unique SCSI ID number. SCSI ID 7 is preset to the SCSI card, giving it the highest priority
on the SCSI bus.
The SCSI IDs of your peripheral devices are usually set with jumpers or with a switch on the
peripheral. Refer to the peripheral manufacturer’s manual to determine the ID of each device
and how to change it.
2.4 Checking the Terminators on the SCSI Bus
In order to stabilize the SCSI bus, only two sets of terminators can be installed - one at each
end of the SCSI bus. The DC-315 series is equipped with Active Terminators that
automatically switch from Enabled to Disabled or vice versa by scanning the devices
connected on the SCSI bus. So, manual termination adjustment is not required. The following
explains the terminator configuration of other devices on the SCSI bus:
Note: There are two types of termination available on SCSI devices, active and passive.
Active termination is strongly recommended to ensure system integrity, particularly
when devices with high transfer rates are being used. A SCSI CD-ROM drive usually
comes with a passive terminator. For proper termination, it is recommended that you
keep this terminator disabled, i.e. avoid connect the CD-ROM drive at the end of the
SCSI bus
3. INSTALLING DEVICE DRIVERS
You need to install host adapter drivers and other software before you can use the device. For
more information, see the readme file of the drivers and other software installation
instructions.
*
For the driver and BIOS updates, please visit our website at
4
DC-315 Series User’s Manual
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