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Controller-to-stack cabling worksheets and cabling examples for multipath HA configurations with four onboard SAS ports

You can use the completed controller-to-stack cabling worksheets and cabling examples to cable common multipath HA configurations that have four onboard SAS ports.

Multipath HA with four onboard SAS ports and one single-shelf stack​

The following worksheet and cabling example uses port pair 0a/0d:



Multipath HA with four onboard SAS ports and two single-shelf stacks​

The following worksheet and cabling example uses port pairs 0a/0d and 0c/0b:



Multipath HA with four onboard SAS ports, a quad-port SAS HBA, and two multi-shelf stacks​

Four port pairs are available for this configuration: 0a/1b, 1a/0d, 0c/1d, and 1c/0b. You can cable port pairs in the order in which they are identified (listed in the worksheet) or you can cable every other port pair (skip port pairs).
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.
The following worksheet and cabling example shows port pairs being used in the order in which they are listed in the worksheet: 0a/1b, 1a/0d, 0c/1d, and 1c/0b.



The following worksheet and cabling example shows port pairs being skipped to use every other one in the list: 0a/1b and 0c/1d.
Note
If a third stack is added later, you use the port pair that was skipped.