Thunder 2500 S1867
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2. Setting Up SCSI Peripherals
Setting up SCSI peripherals before attaching them to the SCSI connectors typically
involves setting SCSI IDs and termination, mounting internal peripherals inside your
computer, and connecting power cables to each peripheral. Since setup can vary from
peripheral to peripheral, always refer to the peripherals documentation for specific
instructions. Below are some guidelines for setting SCSI IDs and termination on your
peripherals.
NOTE:
If you refer to the peripherals documentation for installation
instructions, be sure to return to this document to continue with installa-
tion of the software included in the package.
Check the SCSI IDs
The motherboard SCSI connectors and each peripheral you connect to it requires a unique
SCSI ID number ranging from 0 to 15 on each channel. ID numbers dont have to be
sequential, as long as the connector and each peripheral has a different number for each
channel.
Each SCSI channel on the motherboard is preset to ID 7 and should not be changed. If you
will be booting from a SCSI hard disk, its best to set the disks ID at 0 or 1. Most SCSI
hard disks come from the factory preset to ID 0. The IDs for internal peripherals are
usually set with jumpers; external peripherals are usually set with a switch on the back of
the peripheral.
Terminate the Ends
To ensure reliable communication on the SCSI bus, the peripheral at the end of each cable,
or the end of the cable itself, must have a terminator installed (or enabled). The peripher-
als between the ends of each cable must have the terminator removed (or disabled).
NOTE:
When connecting Ultra2/3 SCSI peripherals, it is important to note
that the necessary termination of the SCSI bus is done either on the end of
the cable (with a permanent terminator) or a separate terminating connec-
tor. Ultra SCSI and earlier single-ended devices had the ability to terminate
the bus directly from the device. Using an Ultra SCSI terminator on an LVD
Ultra2/3 SCSI bus will force the bus to single-ended mode, limiting the speed and cable
distance. For this reason be sure that you have the necessary Ultra2/3 cable or termi
nator before installing the Ultra2/3 SCSI devices.
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important!
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important!
SCSI
