Connecting External Options
Setting SCSI IDs for External Devices
The internal channel connectors and the external channel connector
on the PC ServeRAID Adapter accept SCSI IDs from 0 through 14.
(You cannot use the internal Channel 1 connector when you use the
external connector.) Each device that is attached to the external
channel connector must have a unique SCSI ID, and each device
that is attached to the internal channel connector must have a
unique SCSI ID.
For example, you can have a SCSI ID of 0 for a device that is
attached to the channel 1 connector, and a SCSI ID of 0 for a device
that is attached to the channel 2 connector of the same PC
ServeRAID Adapter. However, you cannot have a SCSI ID of 0 for
two devices that are attached to the same channel connector.
Note: Read the README file on the ServeRAID Configuration
diskette for updated information. Select Option Diskette
from the first menu screen.
You must set a unique SCSI ID for each external SCSI device that is
connected to the SCSI-2 adapter, so that the SCSI-2 adapter can
identify the devices and ensure that different devices do not attempt
to transfer data at the same time. Therefore, do not set the SCSI IDs
for external devices to the values that you use for internal devices.
(See “SCSI Drives” on page 201 for additional SCSI IDs.) Refer to
the instructions that come with the SCSI devices for more
information about setting a SCSI ID.
Your server automatically sets SCSI IDs for hot-swap drives. These
IDs are determined by the drive locations in the bays. The SCSI ID
for the preinstalled CD-ROM drive in bay A is set to 6, and the SCSI
ID for the SCSI-2 adapter is set to 7. The processing sequence for
SCSI devices is set according to their IDs.
Note: If you install a second SCSI-2 adapter, you can use the same
SCSI IDs that you use for the preinstalled SCSI-2 adapter.
274 PC Server 520 User's Handbook for PCI/EISA
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