Date: Wed, 24 Nov 2004 10:54:07 +0100 From: =?ISO-8859-1?Q?Eirik_=D8verby?= <ltning@anduin.net> To: stable@freebsd.org Subject: graid3 - requirements or manpage wrong? Message-ID: <41A45A3F.5010008@anduin.net>
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Hi,
to the best of my ability I have been investigating the 'real'
requirements of a raid-3 array, and cannot see that the following text
from graid3(8) cannot possibly be correct - and if it is, then the
implementation must be wrong or incomplete (emphasis added):
label Create a RAID3 device. The last given component will contain
parity data, all the rest - regular data. ***Number of
compo-
nents has to be equal to 3, 5, 9, 17, etc. (2^n + 1).***
I might be wrong, but I cannot see how a raid-3 array should require
(2^n + 1) drives - I am fairly certain I have seen raid-3 arrays
consisting of four drives, for example. This is also what I had hoped to
accomplish.
Anyone care to shed a light on this? I'd prefer to use graid3 (or 5, if
there was one) instead of gvinum..
Thanks,
/Eirik
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