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Compaq Professional Workstation AP200 Reference Guide
Writer: M. Church Project: Compaq Professional Workstation AP200 Reference Guide Comments: 352620-003
File Name: E-CH04.DOC Last Saved On: 1/19/99 9:40 AM
COMPAQ CONFIDENTIAL - NEED TO KNOW REQUIRED
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:
❏ SCSI ID 0 is reserved for the primary hard drive.
❏ SCSI ID 7 is reserved for the controller.
❏ SCSI IDs 1 through 6 are available.
■ Every SCSI chain or circuit must be terminated (closed) at both ends. If
using a terminated cable, disable the termination for all devices. If using
a non-terminated cable, only disable the termination for the last device
on the chain.