From: "H. Peter Anvin" <hpa@zytor.com>
To: Goswin von Brederlow <goswin-v-b@web.de>
Cc: Nifty Fedora Mitch <niftyfedora@niftyegg.com>,
linux-raid@vger.kernel.org
Subject: Re: Why do I need 4 disks for a raid6?
Date: Wed, 01 Apr 2009 09:09:57 -0700 [thread overview]
Message-ID: <49D391D5.1050509@zytor.com> (raw)
In-Reply-To: <87ljquemy3.fsf@frosties.localdomain>
Goswin von Brederlow wrote:
>
> Actually the definition I read was that raid6 is like raid5 but
> allowing for 2 or more disks to fail without loss. So a 15 disks raid
> with 10 data blocks and 5 parity blocks per stripe would also be raid6.
>
2 or more *arbitrary* disks. You can't, say, have two RAID-5s and call
the combination a RAID-6, because they're not all there.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
prev parent reply other threads:[~2009-04-01 16:09 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-17 19:12 Why do I need 4 disks for a raid6? Goswin von Brederlow
2009-03-18 3:41 ` david.geib
2009-03-18 9:50 ` Goswin von Brederlow
2009-03-18 18:12 ` david.geib
2009-03-18 12:18 ` Andre Noll
[not found] ` <49C0EA5F.9070901@vshift.com>
2009-03-18 12:35 ` Andre Noll
2009-03-18 14:08 ` Goswin von Brederlow
2009-03-18 14:26 ` Robin Hill
2009-03-18 18:48 ` Goswin von Brederlow
2009-04-01 16:08 ` H. Peter Anvin
2009-04-01 17:47 ` Andre Noll
2009-04-01 20:36 ` H. Peter Anvin
2009-04-01 18:07 ` Goswin von Brederlow
2009-04-01 19:05 ` H. Peter Anvin
2009-03-19 23:35 ` Neil Brown
2009-03-20 10:20 ` Goswin von Brederlow
2009-03-23 20:20 ` Nifty Fedora Mitch
2009-03-24 19:32 ` Goswin von Brederlow
2009-04-01 16:09 ` H. Peter Anvin [this message]
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