DS8000 Service Documentation Version 7.5

MAP3230 Attempt to IML back to dual cluster operational mode while in DA Takeover

DA takeover is active on this storage facility.

About this task

Normally two I/O enclosure device adapter (DA) cards work together to manage the DDMs on an FC-AL loop. One DA card is managed by the first LPAR in the storage facility image. The partner DA card is managed by the second LPAR in the same storage facility image. The first LPAR is on one CEC enclosure, and the second LPAR is on the other CEC enclosure.

DA Takeover means a DA card is being controlled by the CEC enclosure that normally controls its partner DA card. In this case, there was a double failure:

The CEC enclosure that normally controls the DA card has failed and is not available for customer use.
The partner DA card is not available for customer use. Either it has failed or the I/O enclosure that contains it has failed.

IML back to dual cluster operational mode while in DA takeover is not allowed. One LPAR has been fenced and can be resumed back to customer mode only by the next level of support after one or more I/O enclosure FRUs in related open serviceable events have been successfully replaced.

MAP3230 Section-1

Procedure

Display open serviceable events.
Do any of the FRU lists contain an I/O enclosure backplane assembly?
- Yes, use that serviceable event to replace the I/O enclosure backplane assembly. After the repair is successful, return here and continue to the next step. If the repair is unsuccessful, retry the repair, and if it still fails, contact your next level of support.
- No, continue to the next step.
Display open serviceable events.
Do any of the FRU lists contain an I/O enclosure device adapter card?
- Yes, use that serviceable event to replace the I/O enclosure device adapter card. After the repair is successful, return here and continue to the next step. If the repair is unsuccessful, retry the repair, and if it still fails, contact your next level of support.
- No, continue to the next step.
Did you replace any FRUs?
- Yes, contact your next level of support. Next level of support will invoke a command to unfence and resume the IML back LPAR. Close the serviceable event that sent you here when the storage facility image is dual cluster operational.
- No, stop and contact your next level of support.