Failed to backup file, but why?

[UT2015]

Hi there,

we have a Veeam Agent job which backups local files on our backup server into the Veeam repository (those local files are copied from external systems periodically to the backup server).

Last night the job failed. In the Veeam Agent GUI there's one warning: "Failed to backup [folder\subfolder\msdb.bak]".

The logfile "Job.Backup_Job_SERVER.Backup.log" contains following lines:

Code: Select all

[05.06.2019 23:15:40] <51> Info           Job progress: '11%', '2,883,156,644,536' of '24,960,980,307,968' bytes, object '0' of '1'
[05.06.2019 23:15:44] <51> Info           [AP] (2b47) output: --asyncNtf:--stg_size:12315834880:0
[05.06.2019 23:15:49] <51> Info           [AP] (2b47) output: --asyncNtf:--stg_size:12347211776:0
[b][05.06.2019 23:15:56] <06> Info           [AP] (461a) output: --asyncNtf:--wn:Failed to backup [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <51> Info           [AP] (840a) output: --asyncNtf:--wn:Failed to backup [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <61> Info           [AP] (b5bc) output: --asyncNtf:--wn:Failed to backup [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <06> Info                   [AP] (461a) warning: Failed to backup [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <51> Info                   [AP] (840a) warning: Failed to backup [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <61> Info                   [AP] (b5bc) warning: Failed to backup [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <51> Warning  Failed to backup [folder\subfolder\msdb.bak][/b]
[05.06.2019 23:15:59] <58> Info           [AP] (2b47) output: --asyncNtf:--stg_size:12376916480:0
[05.06.2019 23:16:04] <52> Info           [AP] (2b47) output: --asyncNtf:--stg_size:12491904512:0

The logfile "Agent.Backup_Job_SERVER.Source.SERVER.d2881f02-5eb9-4ce8-8819-4e2171389f5e.log" contains following lines:

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[05.06.2019 23:14:21] <  2728> alg| Received traffic acknowledge: '7518'.
[05.06.2019 23:14:28] < 12052> cli| Number of sessions: 5. Interval: 599 sec. 
[05.06.2019 23:14:48] <  6228> cli|   - 9%
[05.06.2019 23:15:40] <  6228> cli|   - 10%
[b][05.06.2019 23:15:51] <  6228> fb | ERR |NtfsLib: failed to write data
[05.06.2019 23:15:56] <  6228> fb | ERR |Failed to sync item [folder\subfolder\msdb.bak]
[05.06.2019 23:15:56] <  6228> fb | >>  |NTFS file: failed to write 8388608 bytes at offset 0
[05.06.2019 23:15:56] <  6228> fb | >>  |An exception was thrown from thread [6228].[/b]
[05.06.2019 23:16:36] <  6228> cli|   - 11%
[05.06.2019 23:16:54] <  2728> alg| Received traffic acknowledge: '10024'.
[05.06.2019 23:17:22] <  6228> cli|   - 12%
[05.06.2019 23:18:08] <  6228> cli|   - 13%

All local volumes have enough free space left. The file msdb.bak has a timestamp of 20:10, so it most probably was not in use. The Windows Event Log does not have any warnings at 23:15, which could have something to do with disk problems or anything like that.

Does anybody know what the actual problem might be?

Best regards,
UT2015

[wishr]

Hi UT,

Have you already raised a support case?

Personally, I think the msdb.bak file was locked for some reason. Most likely because it was involved in some independent backup/restore process! Our support engineers should be able to say more based on additional information.

Thanks

[Dima P.]

Hello UT2015,

Due to VSS being used during backup, locks should not be the root cause. My vote goes for detailed log review with our support team. Cheers!

[nikolai.schlabitz]

Did you ever get to the bottom of this one? I am having the same issue backing up SQL file backups.

[wishr]

Hi Nikolai,

I would strongly recommend raising an independent support case as the root cause might be different. Please let us know your case ID once done so we could keep an eye on it.

Thanks