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Example
For example: 1b, 2b, 1d, 2d
Step 3.
In the boxes below the gray boxes, rewrite the D and B port list so that the first port in the list is
moved to the end of the list.
Example
For example: 2b, 1d, 2d, 1b
Step 4.
Circle (designate) a port pair for each stack.
When all port pairs are being used to cable the stacks in your system, circle port pairs in the order
in which they are defined (listed) in the worksheet.
For example, in a multipath HA configuration with eight SAS ports and four stacks, port pair 1a/2b
is cabled to stack 1, port pair 2a/1d is cabled to stack 2, port pair 1c/2d is cabled to stack3, and
port pair 2c/1b is cabled to stack 4.
When not all port pairs are needed to cable the stacks in your system, skip port pairs (use every
other port pair).
For example, in a multipath HA configuration with eight SAS ports and two stacks, port pair 1a/2b
is cabled to stack 1 and port pair 1c/2d is cabled to stack 2. If two additional stacks are hot-added
later, port pair 2a/1d is cabled to stack 3 and port pair 1c/2d is cabled to stack 4.
Note: When you have more port pairs than you need to cable the stacks in your system, the best
practice is to skip port pairs to optimize the SAS ports on your system. By optimizing SAS ports,
you optimize your system's performance.
44
Installation and Cabling Guide for DM120S, DM240S, and DM600S
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