Backup to Tape slowdown 2010 r3
Our Backups to tape have slowed down, it happened overnight and had been running fine for months. I've done the usual things like clean the heads but this has made no difference. Having watched them realtime, the job rate (including verify) seems to get slower as the job progresses. Copying some files from one server to another seems fine, we did 150GB in about 30 mins to the Media Server.
Here's some job history and more detail because it seems to slow down once it starts to backup our main file server, which also holds our SharePoint SQL DB
This is the first item of the job, this happens to be our Media Server that the Tape Unit is connected. It shows the start time on on day, then the next and this looks ok
Backup started on 6/6/2013 at 1:03:10 AM.
Backup completed on 6/6/2013 at 1:21:16 AM.
Backup started on 6/7/2013 at 1:03:16 AM.
Backup completed on 6/7/2013 at 1:26:17 AM.
The the next part of the job, on a remote server which looks to be ok.
Backup started on 6/6/2013 at 1:22:24 AM.
Backup completed on 6/6/2013 at 1:26:23 AM.
Backup started on 6/7/2013 at 1:27:32 AM.
Backup completed on 6/7/2013 at 1:38:02 AM.
Next is our concern, the main file server, same amount of data but this has really slowed up.
Backup started on 6/6/2013 at 1:26:28 AM.
Backup completed on 6/6/2013 at 6:40:57 AM.
Backup started on 6/7/2013 at 1:38:08 AM.
Backup completed on 6/7/2013 at 11:10:05 AM.
The last part of the job is our Exchange Server (2010) which I suspect is delayed because of the one above.
I haven't copied any major data between the file server and media server, or run any test jobs because the backups are finishing late in the afternoon and wondered if anyone had some further ideas. I'm thinking of disabling the SOPHOS av tonight on the Media Server and also peforming some direct diags on the Tape unit itself.