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On Sat, Jun 21, 2003 at 02:41:48PM +0100, Robin Cornelius wrote: > > PS i wonder what the actual probability is for a double disk disaster? I > suspose you would have to factor disk life, mean time between failures and > the actual normal distribution of failure for a given disk which i suspect > the manufactures would not freely give away. > I've seen it happen twice where multiple drives have failed within a RAID5 array. Servers can run for years whilst all the drives are spinning constantly. Stopping them after x years and expecting them to spin up again is a different matter. The common engineering solution to this problem seems to a repeated "tapping" with a hammer, to shock the disk back into life. I've seen this work on occasion but never documented as an approved fix. -- The Mailing List for the Devon & Cornwall LUG Mail majordomo@xxxxxxxxxxxx with "unsubscribe list" in the message body to unsubscribe.