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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. You can work it out with the mean and standard deviation between failures. The manufacturer normally only quotes the mean, but since this is time series stuff, it might be a Poisson distribution, which has sd and mean the same IIRC. Steve -- The Mailing List for the Devon & Cornwall LUG Mail majordomo@xxxxxxxxxxxx with "unsubscribe list" in the message body to unsubscribe.