On Mar 8, 2011, at 12:02 PM, John Hodrien <J.H.Hodrien at leeds.ac.uk> wrote: > The absolute definiton of safe here is quite important. In the event of a > power loss, and a failure of the UPS, quite possibly also followed by a > failure of the RAID battery you'll get data loss, as some writes won't be > committed to disk despite the client thinking they are. Don't forget about kernel panics and the accidentally pulled the plugs... -Ross