I am the Sys admin at an All Mac Shop. Set up as Follows: Xserve connected to 14TB Promise Vtrak Raid via Fiber, Drives 1 & 2 on Xserve Raided with System, Users,Groups & data on vtrac raid. Drive 3 on Xserve used as a CCC emergency Boot. 24 TB NAS connected via ISCI to which whole system is TIME MACHINED for back up. NOTE: all users are MOBILE ACCOUNTS THAT HAVE SERVER HOME FOLDERS. There is an identical setup at a colocation to which the data is Rsynced on an hourly basis. This has worked flawlessly for 3 years but since the last update, something broke in Time machine and backups fail AND APPLE IS NO HELP BECAUSE TIME MACHINE IS NOT AN ENTERPRISE BACKUP SOLUTION. So does anybody have any suggestions? I've looked at Bru, (Overkill) and RETROSPECT JUST PLAIN SUCKS! I also purchased a 16 TB Drobo to test on.