[sam-qfs-discuss] [sam-managers] Disk Archiving File corruption

[Ted Pogue]

Prasun,
    There is a known issue with the stager checking tar headers for disk 
archives in 4.6.

*Synopsis*: Tar header validation skipped


We expect the fix to be in the next 4.6 patch, due out early next year.

Ted



Prasun Gupta wrote:
> We use disk archiving for backing up data. We discovered a bunch of 
> corrupted files on the filesystem. In troubleshooting, I found out 
> that the staging an offline file from an archive (tar file), will give 
> back garbage if the file is not part of an archive.
> This happened to be the case, as a few weeks back archiver logs showed 
> a file was archived to a archive file, but it never went there, 
> another strange thing was the archiver had reset the counter back to a 
> lower numbered file also. These archives were never written to the 
> destination.
>
> But the inode of the file and the archive were inconsistent with the 
> filesystem.
>
> I know of one remedy to resolve this problem is turn on checksum on 
> the file system, but this is going to put a lot of load on the server.
>
> Is there another way ?
>
> Why does the staging process not check if the tar archive file 
> contains file or not, instead of returning garbage back?
>
> Has anyone run into this problem ?
>
> I am currently checking the archive log records with the actual 
> archive file listings to determine how widespread this problem might 
> be, Is there a better way to determine file archive inconsistency ?
>
>
> Any Help or pointer will be greatly appreciated, Thanks in advance.
>
> --Prasun
>