Re: RAID 1 or 5 ?

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#444

From: Colin Andrew Percival
Date: Mon, 02 Aug 1999 00:00

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Bill Todd (billtodd@foo.mv.com) wrote:
: I suspect that statement included an implied "... and still support 2
: drives' worth of data on 4 drives total."  Clearly you could just mirror the
: same single drive's worth of data on all 4 drives and tolerate the
: simultaneous loss of any *3*, and with a bit more ingenuity you could rotate
: 1.333... drives' worth of data around the 4 drives and tolerate the
: simultaneous loss of any 2.

  And with even more ingenuity you could distribute 2-epsilon drives worth
of data around the four drives and tolerate the simultaneous loss of any
two.

Colin Percival

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From: cperciva@sfu.ca (Colin Andrew Percival)
Subject: Re: RAID 1 or 5 ?
Date: 1999/08/02
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