Dell EMC Unity: Hung replication process (Error Codes:0x9ef4 and/or 0x6701140 ) (Dell EMC Correctable)

The initial deletion attemp may have been partial only , and a follow up command line cleanup may be required.

Deleting a LUN replication session from the destination not the source can cause a hung replication process that could result in the below errors.

• Non recoverable error on source side

Trying to delete the session from source side will result in error: (Error Code:0x6500051)

Trying to create another replication session can cause the below:

• Failed: Source in use by another replication process (Error Code:0x9ef4)
• Failed: The specified LUN name has already been reserved or LUN with this name already exists. (Error Code:0x6701140)

• It can also cause orphaned system (Replication) snapshots that cannot be deleted.

The replication session can to be deleted via command line interface , using service tools svc_dataprotection.

If assistance is required on performing this cleanup , please contact Dell EMC Technical Support or your Authorized Service Representative, and quote this Knowledgebase article ID.

From svc_dataprotection help output , examples:

  Delete a replication session by session ID:
  svc_dataprotection -r repsess -a delete -s 42949673102_FCNCH0972C30C3_0000_42949673096_FCNCH0972C30C3_0000

  Delete a task only on the replication session by session ID:
  svc_dataprotection -r repsess -a deletetaskonly -s 42949673102_FCNCH0972C30C3_0000_42949673096_FCNCH0972C30C3_0000

  Delete a replication session of LU by LU name:
  svc_dataprotection -r repsess -a delete -n srcLun1 -t LU

  Delete a replication session of FS by FS OID:
  svc_dataprotection -r repsess -a delete -o 0x2800000003

  Set a sync rate to the session:
  svc_dataprotection -r repsess -a syncrate=high -s 81604378625_FNM00151702100_0000_81604378625_FNM00151702099_0000

  Set a sync rate to ALL sync sessions:
  svc_dataprotection -r repsess -a syncrate=low -s ALL

  Show a sync rate of the session:
  svc_dataprotection -r repsess -a showsyncrate -s 42949673102_FCNCH0972C30C3_0000_42949673096_FCNCH0972C30C3_0000

  List ALL sync replication sessions with each sync rate:
  svc_dataprotection -r repsess -a showsyncrate -s ALL

  Show cg replication sessions with each member sync rate:
  svc_dataprotection -r repsess -a showsyncrate -s 81604378625_FNM00151702100_0000_81604378625_FNM00151702099_0000

  Restore destination NAS server and FS when FS sync replication session is in paused state and source is disruptive
  svc_dataprotection -r repsess -a restore -i FNM00151702100

Examples for resouce snap:
  Delete objects in a snap operation according to the snap name:
  svc_dataprotection -r snap -a delete -n UTC_2017-11-16_03:38:31

  Recover objects in a snap operation according to the snap OID:
  svc_dataprotection -r snap -a recover -o 0x280000000F

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