From: Neil Brown <neilb@suse.de>
To: Guy Watkins <linux-raid@watkins-home.com>
Cc: 'Greg Freemyer' <greg.freemyer@gmail.com>,
'Mark Knecht' <markknecht@gmail.com>,
'Linux-RAID' <linux-raid@vger.kernel.org>
Subject: Re: What RAID type and why?
Date: Sun, 7 Mar 2010 13:21:13 +1100 [thread overview]
Message-ID: <20100307132113.7e2c95b6@notabene.brown> (raw)
In-Reply-To: <9089562724D84B3C858E337F202FF550@m5>
On Sat, 06 Mar 2010 18:17:44 -0500
"Guy Watkins" <linux-raid@watkins-home.com> wrote:
> }
> } At a minimum I would build a 3-disk raid 6. raid 6 does a lot of i/o
> } which may be a problem.
>
> If he only needs 3 drives I would recommend RAID1. Can still loose 2 drives
> and you don't have the RAID6 I/O overhead.
>
and as md/raid6 requires at least 4 drives, RAID1 is not just the best
solution to survive two failures on a 3-device array, it is the only solution.
NeilBrown
next prev parent reply other threads:[~2010-03-07 2:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-06 22:02 What RAID type and why? Mark Knecht
2010-03-06 22:33 ` Greg Freemyer
2010-03-06 23:05 ` Mark Knecht
2010-03-07 0:38 ` Keld Simonsen
2010-05-10 15:20 ` Matt Garman
2010-05-10 15:34 ` Mark Knecht
2010-03-06 23:17 ` Guy Watkins
2010-03-06 23:51 ` Mark Knecht
2010-03-08 20:05 ` Bill Davidsen
2010-03-06 23:56 ` Michael Evans
2010-03-07 2:21 ` Neil Brown [this message]
2010-03-07 8:06 ` Keld Simonsen
2010-03-07 8:10 ` Guy Watkins
2010-03-07 8:22 ` 'Keld Simonsen'
2010-03-07 10:09 ` Michael Evans
2010-03-07 12:52 ` Goswin von Brederlow
2010-03-07 20:40 ` Michael Evans
2010-03-10 17:47 ` Goswin von Brederlow
2010-03-11 10:44 ` Michael Evans
2010-03-06 23:03 ` Asdo
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