SAS Device Miswire

What Caused the Problem?

The storage array 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. RAID Controller Module\expansion enclosure
2. Expansion 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 (Physical Disk Channel port, EMM In port, or EMM Out port). You should only connect a Host Adapter port to a Host Channel port on a RAID controller module.

    Important: If a Host Adapter Miswire is reported, the port on the RAID controller module or EMM that is connected to the HBA will not be able to connect to any device until after the cabling is corrected and the RAID controller module or EMM is power-cycled.
    Example 4: Host Adapter Miswire
    1. RAID Controller Module\expansion enclosure
    2. Expansion 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
    • EMM 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 EMM or a RAID controller module.
    If... Then...
    The port is on a RAID controller module

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

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

    There should be an Offline RAID controller module problem reported in the Summary area.
    d Follow the Offline RAID Controller Module Recovery Steps, ONLY until you have removed the RAID controller module. Disregard any references to new or replacement RAID controller modules.

    After you have removed the RAID controller module, do not continue with the Offline RAID Controller Module Recovery steps until you are instructed to do so.
    e Reinsert the RAID controller module.
    f Complete the rest of the Offline RAID Controller Module Recovery Steps.

    Once you have completed the Offline RAID Controller Module Recovery Steps, go to step 5.
    The port is on an EMM
    a Stop all I/O to the storage array.
    b Physically locate the expansion enclosure that contains the EMM listed in the Details area.
    c Turn off power to all power-fan modules in the expansion enclosure.
    d Wait 30 seconds, and then turn on power to all power-fan modules in the expansion 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 array in step 4, resume I/O.