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MAP 2340: 7031-D24 or 7031-T24 SCSI bus

You are here because the host system cannot access any SCSI device (disk drive module or enclosure services) in a 7031-D24 or 7031-T24 disk subsystem.

Attention: Do not remove power from the host system or the disk subsystem unless you are directed to in the following procedures. Power cables and external SCSI cables that connect the disk subsystem to the host system can be disconnected while that system is running.
  1. Observe the SCSI Bus Split switch.
    Is the disk subsystem powered on?
    No
    Ensure that a SCSI cable is attached to a powered system, and the disk subsystem is powered on. Go to step 2.
    Yes
    Go to step 2.
  2. Is the yellow LED illuminated on the SCSI repeater card?
    No
    Go to step 3.
    Yes
    Replace the SCSI interface card. Go to step 3.
  3. Is the green power LED illuminated on the SCSI repeater card?
    No
    Go to MAP 2020: 7031-D24 or 7031-T24 power.
    Yes
    Go to step 4.
  4. Is the SCSI interface card a dual SCSI interface card?
    No
    Go to step 5.
    Yes
    Disconnect one of the SCSI cables, go to step 5.
  5. Note the positions of all the disk drive modules and the dummy disk drive modules so that you can reinstall the modules into their correct slots later.
    1. Remove all of the disk drive modules.
    2. Go to step 6.
  6. Can the host system access enclosure services?
    No
    In the sequence shown, exchange the following FRUs for new FRUs. Ensure that for each FRU exchange, you check whether you can access the disk drive module, to verify the repair.
    1. External SCSI cable
    2. SCSI interface card assembly
    3. Frame assembly
    4. Power supplies
    5. If the repair is successful, reinstall all of the disk drive modules and cables that were removed in a previous steps.
    6. Go to MAP 2410: 7031-D24 or 7031-T24 repair verification to verify the repair.
    Yes
    Go to step 7.
  7. Reinsert the disk drive modules that you just removed, one at a time, checking for accessibility.
    Can the host system access this disk drive module?
    No
    1. In the sequence shown, exchange the following FRUs for new FRUs. Ensure that for each FRU exchange, you check whether you can access the disk drive module, to verify the repair.
      1. Exchange the disk drive module for a new one.
      2. External SCSI cable
      3. SCSI interface card assembly
      4. Power supply
      5. Frame assembly
    2. If the repair is successful, reinstall all the disk drive modules and if removed, the SCSI interface card assembly.
    3. Go to MAP 2410: 7031-D24 or 7031-T24 repair verification to verify the repair.
    Yes
    Go to step 8.
  8. Have you reinstalled all the disk drive modules?
    No
    Go to step 7
    Yes
    Go to step 9.
  9. (from step 8)
    Can the host system get access to all of the plugged disk drive module and enclosure services?
    No
    Call your support center for assistance.
    1. Exchange the disk drive module for a new one.
    2. Return to step 8.
    Yes
    Go to MAP 2410: 7031-D24 or 7031-T24 repair verification to verify the repair.
Parent topic: 7031-D24 or 7031-T24 maintenance analysis procedures

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Last updated: Wed, January 07, 2015