We have been facing some explosive growth during the past 6 months and have grown past our current backup solution. We are currently backing up via a linux box that has our 740 nfs mounted. Backups are taking sometimes 24-30 hours for incrementals and all weekend for fulls.
What I am looking for is info on how others are backing up 200G volumes on 740's or 760's. I just purchased a pair of 760's and am going to need a nice stable reliable backup system for them.
Direct attach the tape drive (library) to your filer (via SCSI or fibre). That eliminates the bandwith problem. Then you need NDMP backup software to do the backup. We use BudTool but it's going to EOL soon, so we're in the process of evaluating an alternative (Veritas NetBackup vs Legato Networker vs Workstation Solution QuickRestore).