Certain Windows files like the various system and user registries are locked and can't be backed up. Perhaps similar to the files you mention.
This is not a Backuppc or even rsync issue but a Windows limitation. You can verify by for example trying to do an md5sum of the file under cygwin. Only solution I know of is to use something like vshadow to create a shadow copy that you can then back up. I have posted code in the past that does this automatically - check the archives. Kenneth Porter wrote at about 12:59:36 -0800 on Saturday, February 1, 2025: > How can we back up locked files on Windows? > > I'm backing up using rsyncd from Cygwin on Windows 10 x64. I've noticed > that locked files are getting skipped with error 16, resource busy: > > T:\>c:\rsyncd\bin\rsync.exe > 127.0.0.1::c/Users/ken/AppData/Local/Comms/UnistoreDB/store.vol store.vol > rsync: send_files failed to open > "/Users/ken/AppData/Local/Comms/UnistoreDB/store.vol" (in c): Device or > resource busy (16) > rsync error: some files/attrs were not transferred (see previous errors) > (code 23) at main.c(1668) [generator=3.1.2] > > I've tried running the service as System and then adding System to the > Backup Operators group. I've also tried creating a custom user for the > service and added that user to the Backup Operators group. I'd read that > Backup Operators can override file locks but this doesn't seem to work. > > The test file above should be available on other systems. It's part of the > Windows Mail database that holds mail and contacts. This started when I > went hunting for a colleague's Contacts autocomplete list and found it's > supposed to be in this store.vol file. And then I found it's not in the > BackupPC backup, because rsyncd can't access it. > > I've got Power Toys installed which adds "What's using this file?" to the > Explorer file context menu, and that reports svchost.exe, a generic app for > running services provided as DLLs. > > > > _______________________________________________ > BackupPC-users mailing list > BackupPC-users@lists.sourceforge.net > List: https://lists.sourceforge.net/lists/listinfo/backuppc-users > Wiki: https://github.com/backuppc/backuppc/wiki > Project: https://backuppc.github.io/backuppc/ _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: https://github.com/backuppc/backuppc/wiki Project: https://backuppc.github.io/backuppc/
