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How to read a worksheet to cable controller-to-stack connections for multipathed connectivity

You can use this example to guide you through how to read and apply a completed worksheet to cable controller-to-stack connections for disk shelves with IOM12 modules for multipathed connectivity.

Before you begin

Your HA pair configuration cannot be a DM3000x, DM5000x, or DM7000x configuration. DM3000x, DM5000x, or DM7000x configurations use a unique worksheet; see the Controller-to-stack cabling worksheets and cabling examples for common DM3000x, DM5000x, or DM7000x configurations section.

About this task

  • This procedure references the following worksheet and cabling example to demonstrate how to read a worksheet to cable controller-to-stack connections.

    The configuration used in this example is a multipath HA configuration with two quad-port SAS HBAs (eight SAS ports) on each controller and two stacks of disk shelves with IOM12 modules. Port pairs are cabled by skipping every other port pair in the worksheet.

    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.
  • If needed, you can refer to the SAS cabling rules section for information about the controller slot numbering convention, shelf-to-shelf connectivity, and controller-to-shelf connectivity (including the use of port pairs).

The port pairs are cabled using every other port pair in the worksheet: 1a/2b and 1c/2d. The port pairs being skipped to use every other one in the list: 1a/2b and 1c/2d.





  1. Cable port pair 1a/2b on each controller to stack 1:
    1. Cable controller 1 port 1a to stack 1, first shelf IOM A port 1.
    2. Cable controller 2 port 1a to stack 1, first shelf IOM B port 1.
    3. Cable controller 1 port 2b to stack 1, last shelf IOM B port 3.
    4. Cable controller 2 port 2b to stack 1, last shelf IOM A port 3.
  2. Cable port pair 1c/2d on each controller to stack 2:
    1. Cable controller 1 port 1c to stack 2, first shelf IOM A port 1.
    2. Cable controller 2 port 1c to stack 2, first shelf IOM B port 1.
    3. Cable controller 1 port 2d to stack 2, last shelf IOM B port 3.
    4. Cable controller 2 port 2d to stack 2, last shelf IOM A port 3.