Syncing file system failed. Backup may not be completely on disk. Access is denied. (code: 5)

This started after updating to 2.4.11. Windows Server 2012.

Level Time Message
Info

11/22/19 03:39
Starting scheduled incremental file backup…
Info

11/22/19 03:45
Selected no components to backup
Warnings

11/22/19 03:45
Restarting shadow copy of G:\ because it was started by this server
Info

11/22/19 03:45
Change block tracking active on volume G:
Info

11/22/19 03:45
Scanning for changed hard links on volume of “G:”…
Info

11/22/19 03:45
Indexing of “Exec” done. 1 filesystem lookups 353 db lookups and 0 db updates
Info

11/22/19 03:45
Indexing of “Account” done. 5 filesystem lookups 20289 db lookups and 3 db updates
Info

11/22/19 03:45
Indexing of “Public” done. 1 filesystem lookups 1172 db lookups and 0 db updates
Info

11/22/19 03:45
Indexing of “Developer” done. 1 filesystem lookups 5436 db lookups and 0 db updates
Info

11/22/19 03:45
Indexing of “Admin” done. 2 filesystem lookups 2367 db lookups and 1 db updates
Info

11/22/19 03:45
Indexing of “Archive” done. 1 filesystem lookups 41828 db lookups and 0 db updates
Info

11/22/19 03:45
Indexing of “Users” done. 12 filesystem lookups 10381 db lookups and 12 db updates
Info

11/22/19 03:45
Indexing of “Engineer” done. 1 filesystem lookups 128246 db lookups and 0 db updates
Info

11/22/19 03:45
LC_LS4: Loading file list…
Info

11/22/19 03:45
LC_LS4: Calculating file tree differences…
Info

11/22/19 03:45
LC_LS4: Calculating tree difference size…
Info

11/22/19 03:45
LC_LS4: Linking unchanged and loading new files…
Warnings

11/22/19 07:53
Error adding sparse file entry. Could not read metadata from H:\LC_LS4\191122-0339.hashes\Engineer\LCE GROUP\Structural\Jobs\7500\7503 Delfern Capital LLC\Drafting\Sheets\TT.dwg
Info

11/22/19 07:59
Waiting for file transfers…
Info

11/22/19 07:59
Waiting for file hashing and copying threads…
Info

11/22/19 08:00
Writing new file list…
Info

11/22/19 08:00
All metadata was present
Info

11/22/19 08:00
Number of re-added file entries is 207006
Errors

11/22/19 08:00
Syncing file system failed. Backup may not be completely on disk. Access is denied. (code: 5)
Info

11/22/19 08:00
Transferred 251.54 MB - Average speed: 138.688 KBit/s
Info

11/22/19 08:00
(Before compression: 729.248 MB ratio: 2.89914)
Info

11/22/19 08:00
287.396 GB of files were already present on the server and did not need to be transferred
Info

11/22/19 08:00
Time taken for backing up client LC_LS4: 4h 21m 7s
Errors

11/22/19 08:00
Backup failed

2.4.11 tests during startup if syncing volumes works (specifically the volume the backup storage is on). In your case this test seems to succeed (Failure would be in the server log file after startup…). If it succeeds a later volume sync is fatal for a backup.

Thank you for the reply. What do I need to do to resolve this issue?

Decided to start a full backup in hopes it clears the issue. Backup hasn’t completed for a week, getting desperate.

3 days for a full backup, same error. Since this isn’t working I’ll look for instructions on downgrading to an older version and pray it doesn’t break everything.


Capture

The one difference between this client and all others is the client being backed up to a redirected/mapped/whatever-it’s-called drive as a folder. Renamed the folder, created a normal folder for the client, ran a small full backup without error. Prior to 2.4.11 upgrade the drive-as-folder had been working flawlessly and allowed me to add storage easily for large clients (this is the only large client). I formatted the drive, replaced the mapping and tried again without success. I was running 2.3.8 before the upgrade.

I was guessing it would be something like this…

https://github.com/uroni/urbackup_backend/blob/004b9d351683253fe34f8ed1383cc71d2868bfeb/urbackupcommon/os_functions_win.cpp#L1616 probably needs to by fixed to work for non DOS letter volumes. Patches welcome.

Previous versions also failed, but ignored the failure. Not syncing backups can cause corrupted or partial backups.