Making Edubuntu More Fault Tolerant / Recoverable

If an experienced sysadmin is asked to set up Edubuntu, one of the things they should think about is what happens in the event of failures. If a more novice admin (eg a teacher) does it, it probably never occurs to them. Then one day a disk fails in their thin client server, 30 desktops go down and all their data is lost. The down side of centralisation (ie single point of failure) suddenly hits them. There is little treatment of this currently in edubuntu. Only an experienced admin will realise that they need to put in lots of extra measures to prepare for inevitable failures.