Cabling Guidelines; Cable Configurations - Silicon Graphics DSS-1 Hardware Description

DSS-1 and DSS-2 Hardware Description Product Overview
Cabling Guidelines
Cable Configurations
HMM-199-A
The DSS-IIDSS-2 is configured internally by the backplane as 4 pairs of disk
drive slots. The pairs are JI/12, J3/J4, J5/J6, and 17 IJ8. Each of the 8 connectors
is associated with I of the 8 drive slots. Each drive pair can be connected to a
SCS-IO/SCS-li and/or to another drive pair within the subrack. Refer to
Figure 10 for examples of configurations within a subrack. The following
configurations are possible:
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•
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4 individual channels of 2 drives each (example
1)
2 individual channels of 4 drives each (example 2)
2 individual channels: 1 channel of 6 drives and 1 channel of 2 drives (not
shown)
1 channel of 8 drives (example 3)
2 individual channels: 1 channel of 2 drives and I channel with the
maximum configuration of 14 drives (example 4)
Typically connectors 11, J3, J5, and 17 are the input for the drive pair and
connectors 12, J4, J6, and J8 terminate the SCSI bus or daisy chain to the next
drive pair. Example 4 shows two DSSs chained together when more than 8 drives
are required on a SCSI bus.
Silicon Graphics Proprietary
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