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Forum Discussion
dsnpevl
Jan 03, 2015Virtuoso
After backup: Destination is read-only?
I'm working on implementing a proper backup procedure as most experts on this forum recommend. But when trying to backup a large amount of data, I keep getting this error message: Backup: Error bac...
- Aug 02, 2015
Have been looking for a solution for this problem for a long time, but never managed to find the root cause.
In the end, I decided to remove the offending subdirectory that contained a file backup of a Windows system. This solved the problem with the backup procedure.
jtowntex
Dec 01, 2015Guide
I had similar issues trying to back up a shared network drive to another netwrok drive that only I could see. After the initial backup it would ofcourse only update the changes. After a recent update to the newest software for the shared NAS the back up function stopped working.
"destination is read-only or files/folders could not be created. Check if these files or folders meet the destination file system limitation."
The destination is not read only. I unmounted the drives and hooked them up directly to my PC and scanned the file system with that.....blah blah blah. I tried a ton of different things before I finally just renamed the old back up folder and created a new empty one. The next backup then repopulated this new folder and everything works fine. Subsequent back ups have ran fine as well. I don't know if anyone else will find this helpful but it worked for me.
On a side note, I would be curious to hear an explanation for why this problem even occurred. Why would an update cause the system to erroneously identify a file as read only?
StephenB
Dec 02, 2015Guru - Experienced User
The status info stored on the drive includes a "dirty' bit, which usually ends up set if if the disk is not properly dismounted - esp. if a file copy was in progress when that was done.
If it is set (for whatever reason), the volume is mounted read-only by the NAS. On Windows, it results in a scan/repair prompt.
Clearing the dirty bit generally is only done as part of a scan/repair process that ensures the NTFS structures are ok. The NAS doesn't have the ability to do that, so you need to connect the drive to a system that can do it.
Your situation with the backup might have had a different cause of course.
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