Installing Optional Scsi Devices - Compaq AP200 - Professional - 128 MB RAM Reference Manual

4-22 Hardware Upgrades

Installing Optional SCSI Devices

Select models of the Compaq Professional Workstation AP200 have an
internal SCSI hard drive preinstalled. You can install additional high-
performance SCSI devices using the external SCSI connector located on the
rear panel of the workstation.
Important Guidelines for Installing
Optional SCSI Devices
If you are installing additional SCSI devices, you MUST adhere to the
following guidelines:
To preserve data integrity, do not install more than 7 SCSI devices per
SCSI controller.
The integrated Wide-Ultra SCSI controller requires that a unique SCSI
ID (0-7) be set for each SCSI device installed. The controller identifies
a SCSI device by its SCSI ID number rather than its location. Moving a
SCSI device from one position to another on the SCSI chain does not
affect the communication between the controller and the SCSI device.
The reserved and available SCSI ID numbers for SCSI devices are as
follows:
Every SCSI chain or circuit must be terminated (closed) at both ends.
Termination can be accomplished by using the terminating feature on
the device or by using a terminated cable.
SCSI devices may not have terminating jumpers on the device.
Termination on these devices must be achieved with a terminated
cable.
SCSI ID 0 is reserved for the primary hard drive.
SCSI ID 7 is reserved for the controller.
1 through 6 are available.