Example 3. Broken Loop (Disk Drive Removed) - IBM Advanced SerialRAID Adapters SA33-3285-02 User Manual

Example 3. Broken Loop (Disk Drive Removed)

In Figure 58 on page 407, disk drives 1 through 8 are connected to connectors A1 and
A2 of the SSA adapter 1 , but the loop is broken because disk drive number 3 has
been removed. Disk drives 9 through 12 are connected to connectors B1 and B2 of the
same SSA adapter. Disk drives 13 through 16 are connected to connectors A1 and A2
of a different SSA adapter 2 .
Although the missing disk drive is reported as an error, all the remaining disk drives can
still communicate with the using system. Disk drives 1 and 2 can communicate through
connector A1 of the SSA adapter 1 . Disk drives 4 through 8 can communicate
through connector A2 of the SSA adapter. Disk drives 9 through 12 can communicate
through connectors B1 and B2 of the same SSA adapter (normal loop); disk drives 13
through 16 can communicate through connectors A1 and A2 of the SSA adapter 2 .
406
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