PBS is giving an error: TASK ERROR: marking used chunks failed: update atime failed for chunk/file

prof343

New Member
Nov 4, 2025
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Hello! PBS is giving an error:

TASK ERROR: marking used chunks failed: update atime failed for chunk/file "/var/proxmox/.chunks/2ad7/2ad7f888cc577c682ff68a529772c66e9a65ab701436a022718533fac15389c6" - EBADMSG: Not a data message.

I checked, chunks/2ad7 is empty. I may have interrupted the backup, as these are test virtual machines. The cleanup is not working properly. All virtual machine backups are verified and in the OK state. How can I resolve the error? Thanks!
 
Last edited:
How can I resolve the error?
That chunk is gone.

The only way to re-create it, is to run a new backup task. If - and only if - the corresponding data still exists on the source side then this chunk will be filled with data again.
 
First, run a verify job on whole datastore of the PBS again. The PBS has to know there are some chunks missing. If everything in the OK state, that chunk will not be recreated.