Skip to main content
NetApp Knowledge Base

CONTAP-480647: Critical WAFL Inconsistency triggered by Pseudo Bad Block Corruption

  1. Last updated
  2. Save as PDF
Views:
47
Visibility:
Public
Votes:
0
Category:
ontap-9
Specialty:
CORE
Last Updated:

Issue

  • WAFL inconsistency is reported on a volume and the following alerts are seen in the event logs:

[Node-01: wafl_exempt04: wafl.raid.incons.userdata:error]: WAFL inconsistent: inconsistent user data block at VBN 1234567890 (vvbn:12345670 fbn:0 level:0) in public inode (fileid:222222 snapid:111 file_type:1 disk_flags:0x8002 error:121 raid_set:1) in volume vol_1@vserver:9b3XXXX-97XX-11XX-a2XX-000dXXXXXXXa.
[Node-01: wafl_exempt04: wafl.incons.userdata.vol:alert]: WAFL inconsistent: volume vol_1@vserver:9b3XXXX-97XX-11XX-a2XX-000dXXXXXXXa has an inconsistent user data block. Note: Any new Snapshot copies might contain this inconsistency.
[Node-01: wafl_exempt04: callhome.wafl.inconsistent.user.block:alert]: Call home for WAFL INCONSISTENT USER BLOCK

  • WAFL is unable to recover the blocks that are marked as a pseudo bad block (E_PSEUDOBAD_BLOCK). Consequently, WAFL flags the file system as inconsistent to prevent further data corruption.
  • The corruption is localized to the reported volume, with no signs of RAID or aggregate-level errors. This indicates that the issue is confined to the specific volume and does not affect at broader level.

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.