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ONTAP 9.3 upgrade to 9.4, 9.5 or 9.6 panics during giveback operation

Last Updated:

Applies to

  • ONTAP:
    • 9.3P18 or lower
    • 9.4
    • 9.5P14 or lower
    • 9.6P9 or lower


When upgrading ONTAP from 9.3 to 9.4, 9.5 or 9.6, a node fails during giveback with the following error and panic:

Wed Apr 15 19:18:15 CST [ToasterA: fmmbx_instanceWorker: fmmb.add.problem:error]: Error attempting to add disk 6002538A:76118940:500A0981:00000002:00000000:00000000:00000000:00000000:00000000:00000000 as a Local HA mailbox disk.

PANIC : prod/common/ha/fmmbx_replMgr.c:6429: Assertion failure.

Prior to the upgrade, ONTAP reports failures for the same mailbox disks within EMS similar to the following:

Sat Mar 21 08:25:28 CST [ToasterA: fmmbx_instanceWorker: fmmb.BlobNotFound:alert]: params: {'owner': 'Partner', 'reason': 'unable to retrieve blob from mailbox disk', 'blob_id': '3'}


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