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WAFL reports Inconsistent user data block for a volume which is part of snapmirror

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Applies to

  • ONTAP 9.13 and below
  • Temperature Sensitive Storage Efficiency (TSSE)
  • SnapMirror

Issue

  • Cross version SnapMirror replication from Source ONTAP at 9.14.1 or higher to Destination at 9.13.1 or lower.
  • TSSE should be enabled.
  • The replication from higher version to lower version sends data blocks in compressed format which only 9.14 and above version understands.
  • Due to which the destination marks these blocks are psuedo bad, causing the inconsistencies.

EMS-log:

[node-name: wafl_exempt10: wafl.raid.incons.userdata:error] WAFL inconsistent: inconsistent user data block at VBN 43610377660 (vvbn:388744763 fbn:1508354829 level:0) in public inode (fileid:96 snapid:0 file_type:15 disk_flags:0x8402 error:120 raid_set:0) in volume <vol-name>@vserver:<uuid>.
[node-name: wafl_exempt10: wafl.incons.userdata.vol:alert]: WAFL inconsistent: volume <vol-name>@vserver:<uuid> has an inconsistent user data block. Note: Any new Snapshot copies might contain this inconsistency.
[node-name: wafl_exempt10: callhome.wafl.inconsistent.user.block:alert]: Call home for WAFL INCONSISTENT USER BLOCK

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