We've got a backup server running Server 2003 SP2 and BackupExec v12.5 rev 2213. It's been merrily backing up some old Novell fileservers at around 1000 MB/min or more - up to nearly 2000 MB/min.
We've been migrating data off these fileservers to Server 2008 R2 but these are backing up much slower - often less than half the speed - eg 300 to 500 MB/min. One fileserver has a fibre channel SAN and another is virtualised and has iSCSI SAN storage but there's no significant backup speed difference between them. Both are slow compared to the old Novell servers.
A second backup server running Server 2008 R2 SP1 and BackupExec 2012 v14.0 rev 1798 is backing up a Server 2003 fileserver at about 500 MB/min as well.
Does anyone have any experience of this sort of thing or any suggestions as to how we could look into it? Thanks.