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How to troubleshoot a "Permanent errors on all HA mailbox disks" panic

Last Updated:

Applies to

  • ONTAP 9
  • AFF Systems
  • ASA Systems
  • FAS Systems
  • Panic_Message: Permanent errors on all HA mailbox disks (while marshalling header)


A node panic containing the string “Permanent errors on all HA mailbox disks” indicates that the node was unable to talk to the HA mailbox disks.

  • The HA mailbox disks are the first two disks of the aggregate containing the root volume.
  • The controller was not able to talk to either the parity or the first data disk.
  • Various component failures can cause one or more disks to become inaccessible.  
    • Typically, the root problem is either a single disk  or a non-disk component (e.g. bus adapter, cable, shelf, etc.) that causes several disks to appear to be inaccessible. 

Example EMS Message

Thu Feb 16 17:27:14 +0800 [node1: fmmbx_instanceWorker: sk.panic:alert]: Panic String: Permanent errors on all HA mailbox disks (while marshalling header) in SK process fmmbx_instanceWorker on release 9.11.1P5 (C)


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