Sorry people - maybe I'm having a bad fur day. But I do not see why one would want to implement a RAID system without using a UPS... That's like building a car with airbags but without a steering wheel! (You're heading for trouble no matter what.) Oh yes, I know some people like to use (ATA)RAID for striping purposes - hmmm... Sincerely, Martijn Tigchelaar. > The initial problem wasnt a bad disk.. > > Just if a power failure occurs and an actual write operation > was done on one disk only, so that the contents of the disks > dont match.