One of our customers uses Backup Exec 2010 R3 running on Windows Server 2003 (64bit) to backup Exchange 2007 to a RAID5 volume on a Buffalo TeraStation NAS.
The backups hve been running fine for a couple of years, with the Exchange backup taking between 2 and 2 and a half hours to backup a database of abour 100GB in size.
Recently, however, the backups started taking over 8 hours most nights, although some nights they drop back to the normal 2 hours or so. There's nothing extra in the logs when the backups take longer, they just seem to take a lot longer to run.
So far, we've upgraded from R1 to R3 but this made no difference. If we disable GRT, backups are consistently quick so the issues definitely appears to be related to GRT. I've just completed the B2Dtest to check the NAS is okay and it reported reparse and sparse warnings but repeating the test against the temp backup location for GRT is fine so I don't believe this is an issue (although I'm not convinced the NAS isn't to blame).
A restart of the server usually fixed this for a couple of days but then the backups get slow again. What's odd, is they are always either about 2 hours or about 8 hours, never anything in between.
Anyone else seen this or got any suggestions as to how I can resolve it as the customer is started to get a bit fed up with backups running for so long.
Thanks
