I have a four-disk, RAID-5 Seagate business NAS connected to my 1 Gb home network and mainly got it to backup my iMac and MacBook. I used instructions from this website to transfer my existing TM backups from external USB drives, to the NAS, http://pondini.org/OSX/Home.html , then, TRIED to keep it going. Seems that every few days I get a message on one computer or the other that TM has detected an issue with the backup, and has to recreate it--so much for a stabile and usable backup. I've Googled and asked the question on Apple and other Forums about using the NAS, and keep getting told nothing will work but Apple's own products, even if the NAS supports AFP. I've opened three cases with Seagate, and they state TM IS supported and should work, and...isn't their NAS. I am using Norton Security, and thought that might be an issue, but, I have excluded the drive and shares from being scanned, and still get the problem. Being as it is happening with both my computers, I kinda think it's not me or OS X or the computers themselves. Anyone that has this working, have a clue as to what I need to do? Thanks!