Installation
Ultra Wide SCSI Mode
22
Ultra Wide SCSI Mode
Several possible configurations exist for the CR8e in Ultra Wide SCSI mode.
However this manual will discuss the two possible configurations using the I/O
Interface card in Ultra Wide SCSI mode: dual-bus module in a single enclosure and
single-bus module in a single enclosure. Refer to the nStor Feature Card User’s
Guide for additional configurations when using the Ultra Extender or Differential
Converter card.
When configuring a dual-bus enclosure subsystem with an AM RAID Controller,
one channel on the controller connects to Channel #0 on the I/O Interface card
and the other channel on the controller connects to Channel #1 on the I/O
Interface card – each channel addresses either the upper (right) or lower (left)
bank of drives. When configuring the single-bus enclosure with an AM RAID
Controller, one channel on the controller connects to the right or upper channel
(Channel #1) connector on the I/O Interface card and addresses both banks of
drives.
From the front, the drives slots are divided into two banks. The left or upper four
front drive slots, which are connected to “Channel 1” on the I/O Interface card,
and the right or lower four front drive slots are connected to “Channel 0” on the
I/O Interface card.

Dual-Bus Enclosure

With this configuration you will have a total storage capacity of up to 145 GB
(using 18 GB disk drives) per subsystem enclosure.
The SCSI IDs of the drives are set by the SAF-TE card defaults to IDs 0, 1, 2, and
4, from the front beginning with the drive located on the right or lower slot of
each bank. The SCSI IDs can be manually changed from the OCP, if required.
Both banks of drives will normally use the same sequence of SCSI ID numbers
when the Dual-Bus module is installed.
NOTE: SCSI ID 3 is reserved for the SAF-TE card processor.
CAUTION: Ensure that the power switch is in the OFF (O) position for both the
host system and the CR8e subsystem before connecting any cables.
1Connect one end of a one meter data cable to the Channel #1 connector on
the AM RAID Controller.