StorCase Technology CSI-to-SCSI Single & Dual RAID - Manual (Page 23)

10 Installation
StorCase Technology, Inc. Dual RAID Module User's Guide - Rev. A03
DUAL RAID CHANNEL CONFIGURATIONS
CAUTION: Offset VHDCI cable connectors must be used for proper fit. Failure to use
proper cables may result in damage to the I/O VHDCI connectors on the
InfoStation I/O modules and Dual RAID Controller Module unit! RAID
Controller "Kits" containing external I/O cables are available; contact
StorCase for further ordering information.
NOTES: StorCase recommends the use of Port A-1 & A-2 when configuring typical
RAID channels (as shown in Figures 7, 8, and 9). In the special cases
where extra length cables are required (up to 12m maximum), use Port B
instead.
Controller A (Primary) disk channel SCSI ID (Initiator ID) is factory set to
SCSI ID7. DO NOT configure any other devices to ID7 on the disk channel,
or the configuration will fail to operate!
Controller B (Secondary) disk channel SCSI ID (Initiator ID) is factory set
to SCSI ID6. DO NOT configure any other devices to ID6 on the disk channel,
or the configuration will fail to operate!
Up to 14 disks per SCSI channel with Dual RAID Controller Module unit
installed (14 Disks x 2 Channels = 28 Disks Total).
StorCase does not recommend changing the factory default Initiator ID(s).
Default operating mode for the Dual RAID Controller Module unit is Active-
Passive.
Default operating mode for the Single RAID Controller Module unit is Stand-
Alone Dual Port.
Default operating mode for the Single RAID Controller Module upgrade is
Stand-Alone Dual Port.
If upgrading a Single RAID Controller Module unit with the Single RAID
Controller Module upgrade (to a Dual RAID Controller Module configura-
tion), make sure to reconfigure the operating mode accordingly.
When in Active-Active mode, the dual controllers communicate with each other using SCSI
Initiator IDs 6 & 7 on the disk channels. IDs 6 & 7 are factory set to ensure optimum
communication between the two controllers. These IDs cannot be changed while in Active-
Active mode. DO NOT configure any other devices to IDs 6 & 7 on the disk channels, or the
Active-Active configuration will fail to operate!