Hi there in Virtual World :)
Running Veeam 11 - We experienced a complete full “Files to Tape” backup when the daily Tape job ran for the first time after entering Daylight Saving Time (DST) last weekend.
ALL files in our backup Disk repository (xx TB) - that means UNCHANGED Veeam backup files from the last 4 months - was all sent to Tape once again - taking several job-runtime days to finish - and filling up a lot of new Tapes, which we needed to supply into the Tape library.
Have anybody else experienced similar issues?
As far as I have read - Veeam operates in the UCT format - which should not be sensitive due Server time changes or DST - except changes in the local job time schedule:
Daylight savings time - Veeam R&D Forums
Daylight saving switch changes job start time - Veeam R&D Forums
We didn`t have any other issues running the usual VM Machine jobs to disk.
This issue has been raised to the Veeam Support - and it has been escalated to their RnD engineers.
So hopefully they will soon find the root cause and the fix for it - so that we never run into the phenomenon again.