Dot Hill Systems SANnet II 200, Installation, Operation And Service Manual

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4-12 SANnet II 200 SCSI Array Installation, Operation, and Service Manual • June 2005
Figure 4-9 Single-Bus Connection: All Drives are Assigned to a Single Channel (CH 0)
2. To configure an expansion unit as a single-bus configuration, connect the SCSI jumper
cable between SCSI ports (lower left and upper right ports), as shown in Figure 4-10.
Tighten the cable jack screws with six full clockwise turns to ensure proper connection
and operation.
Figure 4-10 Required Jumper Cabling for a Single-Bus Expansion Unit
Caution –
A maximum of 16 drive IDs is allowed per channel. Therefore, with a 12-
drive array, do not connect a split-bus channel 0 or channel 2 (6 IDs) to a single-bus
expansion unit (12 IDs).
3. (Optional) Use a SCSI cable to connect a RAID array (channel 2 port) to an expansion
unit (lower right port). Tighten the cable jack screws with six full clockwise turns to
ensure proper connection and operation.
The configuration in Figure 4-11 shows a RAID array with all its drive IDs assigned to
channel 0, and an expansion unit with all its drive IDs assigned to channel 2.
Note –
In a single-bus configuration with an expansion unit, the jumper cable must be
attached to the lower left and upper right ports. The host connection must be connected
to the lower right port of the expansion unit.