On Wednesday, May 13, 2015 10:43:35 AM you wrote: > The backup did not span more than one tape. > Also, I noted that if I restore the problematic files on the backup > server, they are not corrupt. So - something seems to be happening on the > way back to the client. > > > Should I suspect networking issues? > My vtapes are on a software-raid (mdadm) array. Could that somehow affect > the process (would be weird, but I have to ask) > Behaviour was the same with and without holding disk. >
If you can consistently demonstrate correct restores on the server, but not on the client, then you either have a networking issue or some hardware problem on the client itself. Try restoring over SSH to rule out networking. If you restore the same files repeatedly on the backup server itself and some attempts are corrupt and some are not, you might have an issue on the backup server. In particular, consumer SATA drives can experience a fairly high error rate while reading data, that would probably not be detected unless you're running zfs, btrfs, or another file system that can verify and correct file integrity on the fly. In either case, it's unlikely to be an amanda or other software problem, and you can probably test for it just by copying large files around without amanda involved.
