topic Re: Block checksum mismatch detected in WAFL external cache, block 0 in ONTAP Discussions

Block checksum mismatch detected in WAFL external cache, block 0

EVERT_HVA — Thu, 05 Jun 2025 06:14:26 GMT

Hi,

I've receiving these console warning messages several times a day:

Sun Dec 2 21:17:05 CET [extCache.io.BlockChecksumError:warning]: Block checksum mismatch detected in WAFL external cache, block 0.

Sun Dec 2 23:35:27 CET [extCache.io.BlockChecksumError:warning]: Block checksum mismatch detected in WAFL external cache, block 0.

Mon Dec 3 08:36:37 CET [extCache.io.BlockChecksumError:warning]: Block checksum mismatch detected in WAFL external cache, block 0.

Tue Dec 4 03:32:54 CET [extCache.io.BlockChecksumError:warning]: Block checksum mismatch detected in WAFL external cache, block 0.

Tue Dec 4 13:13:02 CET [extCache.io.BlockChecksumError:warning]: Block checksum mismatch detected in WAFL external cache, block 0.

Tue Dec 4 15:27:50 CET [extCache.io.BlockChecksumError:warning]: Block checksum mismatch detected in WAFL external cache, block 0.

I can't find any related information about these warnings. Does anyone knows what these messages mean?

EVERT_HVA — Wed, 05 Dec 2012 09:32:03 GMT

P.S. This is on a FAS3240 (HA pair) with 8.0.2P5 7-Mode.

thomas_glodde — Wed, 05 Dec 2012 11:39:21 GMT

this is a known issue, nothing is wrong, just ignore, is fixed in future ontaps

EVERT_HVA — Wed, 05 Dec 2012 14:13:04 GMT

Ok, thank. If it's a known issue, do you know the BUG ID?

peter_lehmann — Wed, 05 Dec 2012 16:32:46 GMT

*let me google that for you*

Seems to be fixed in 8.0.4 and 8.1.2... Can you try?

EVERT_HVA — Thu, 06 Dec 2012 11:00:46 GMT

Thank you for the help+link (as Google did not). Will schedule ONTAP update, but as you already told, this message can safely be ignored.