Skip to main content
NetApp Knowledge Base

WAFL inconsistent user data block due to raid.cksum.bad.file.block error

Last Updated:

Applies to

  • ONTAP 9
  • Multiple models of disks


  • Multiple disks and models reporting Medium errors. Example:

[node_name: disk_server_0: disk.ioMediumError:notice]: Medium error on disk 0a.01.1: op 0x2f:0cf77000:0400 sector 217542656 SCSI:medium error -  - If the disk is in a RAID group, the subsystem will attempt to reconstruct unreadable data...

  • Bad block checksum , raid_multierr_bad_block_1 or raid_tetris_media_err_1 messages reported. Example:

node_name ERROR raid.cksum.bad.file.block: Reading bad block on volume vol_name, Disk /aggr/plex0/rg0/0a.00.1 Shelf 0 Bay 1 (...) UID [...], disk block 24668672,...

  • WAFL inconsistency triggered as a consequence. Example:

[node_name: wafl_exempt07:]: WAFL inconsistent: inconsistent user data block at VBN 16039896320 (vvbn:1028691064 fbn:2137234048 level:0) in public inode (fileid:96 snapid:0 file_type:15 disk_flags:0x8402 error:120 raid_set:1) in volume vol_name...

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.