Installing Internal Drives
If you install additional SCSI devices in a non-disk-array model, you
must set a unique identification (ID) for each SCSI device that you
connect to the integrated SCSI-2 connector. This enables the SCSI-2
controller to identify the devices and ensure that different devices
do not attempt to transfer data at the same time.
The SCSI ID address jumper (J12), a pin block with four pairs of
pins, is located on the rear of the backplanes in banks C, D, and E.
When two backplanes are daisy-chained in your disk-array model,
the first backplane address jumper (for example, Bank C) must be
set to LO, defining the SCSI IDs as 0 through 5. The second
backplane (in this example, bank D), must be set to HI, defining the
SCSI IDs as 8 through 13. (See “Setting Backplane SCSI ID Jumpers
(J12)” on page 274.)
The order in which the server scans the SCSI devices is based on the
SCSI IDs. The scanning sequence proceeds from 0 to the
highest-numbered SCSI ID.
The SCSI ID for the preinstalled CD-ROM drive in bay A1 is set to
6, and the SCSI ID for the SCSI-2 controller is set to 7. Your server
automatically sets SCSI IDs for hot-swap drives. If you need to set
SCSI IDs for SCSI devices, refer to the instructions that come with
these devices.
Note: Any information about SCSI drives also applies to other SCSI
devices, such as scanners and printers.
For non-disk-array models:
Fast/Wide (16-bit) devices support SCSI IDs 0 to 15
Narrow (8-bit) devices support SCSI IDs 0 to 7
For disk-array models:
The external channel connector supports SCSI IDs 0 to 15
The internal channel connectors support SCSI IDs 0 to 15
Chapter 6. Installing Options
219
Summary of Contents for PC Server 520
Page 1: ...PC Server 520 User s Handbook for PCI Micro Channel IBM...
Page 86: ...Installation Checklist 70 PC Server 520 User s Handbook for PCI Micro Channel...
Page 146: ...Using the Mini Configuration Program 130 PC Server 520 User s Handbook for PCI Micro Channel...
Page 190: ...Using the SCSISelect Utility Program 174 PC Server 520 User s Handbook for PCI Micro Channel...
Page 385: ...Installing Additional Test Programs 207 CMD 3 Chapter 7 Solving Problems 369...
Page 438: ...IBM Part Number 78H6336 Printed in U S A May 1996 78H6336...