SAS Device Miswire

What Caused the Problem?

The storage subsystem contains an improper connection between two Serial Attached SCSI (SAS) ports. The Recovery Guru Details area provides specific information you will need as you follow the Recovery Steps.

Important Notes

Example 3: Host Channel Miswire
1. Controller\drive enclosure
2. Drive enclosure

  • Host Adapter Miswire - This miswire condition occurs when you connect an external Host Adapter port to any port other than a Host Channel port (Drive Channel port, ESM In port, or ESM Out port). You should only connect a Host Adapter port to a Host Channel port on a controller.

    Important: If a Host Adapter Miswire is reported, the port on the controller or ESM that is connected to the HBA will not be able to connect to any device until after the cabling is corrected and the controller or ESM is power-cycled.
    Example 4: Host Adapter Miswire
    1. Controller\drive enclosure
    2. Drive enclosure
    3. Host

  • Recovery Steps

    1 Use the information provided in the Recovery Guru Details area to determine which port is the origin of the miswire. Using this information, trace the cable that is attached to the miswired channel or port to the connector on the other end.
    2 Refer to your cabling documentation to reconnect the cable to the appropriate port. It may be necessary for you to reconnect more than one cable in order to have a valid configuration.

    Once you have a valid cabling configuration, go to step 3.

    3

    Check the Details area to see which type of miswire is being reported.

    If... Then...
    The miswire type is:
    • Invalid SAS Topology
    • ESM Miswire
    • Host Channel Miswire
    Go to step 5.
    The miswire type is "Host Adapter Miswire"
    Go to step 4.
    4 Check the Details area to see whether the miswired port is on an ESM or a controller.
    If... Then...
    The port is on a controller

    The controller must be removed and reseated in order to power-cycle the controller.

    a Highlight the affected controller in the Physical View of the Subsystem Management Window
    b Select Advanced >> Recovery >> Place Controller >> Offline menu option.
    c Click the Recheck button to rerun the Recovery Guru.

    There should be an Offline controller problem reported in the Summary area.

    d Follow the Offline Controller Recovery Steps, ONLY until you have removed the controller. Disregard any references to new or replacement controllers.

    After you have removed the controller, do not continue with the Offline Controller Recovery steps until you are instructed to do so.

    e Reinsert the controller.
    f Complete the rest of the Offline Controller Recovery Steps.

    Once you have completed the Offline Controller Recovery Steps, go to step 5.

    The port is on an ESM
    a Stop all I/O to the storage subsystem.
    b Physically locate the drive enclosure that contains the ESM listed in the Details area.
    c Turn off power to all power-fan canisters in the drive enclosure.
    d Wait 30 seconds, and then turn on power to all power-fan canisters in the drive enclosure.
    c Go to step 5.
    5 Click the Recheck button to rerun the Recovery Guru. The failure should no longer appear in the Summary area. If the failure appears again, contact your technical support representative.
    6 If you stopped I/O to the storage subsystem in step 4, resume I/O.