From: "H. Peter Anvin" <hpa@zytor.com>
To: SandeepKsinha <sandeepksinha@gmail.com>
Cc: Linux RAID <linux-raid@vger.kernel.org>
Subject: Re: RAID4 and RAID5 Code
Date: Fri, 15 May 2009 09:08:36 -0700 [thread overview]
Message-ID: <4A0D9384.1020805@zytor.com> (raw)
In-Reply-To: <37d33d830905140957q6e180d89v4cd4a21d23471481@mail.gmail.com>
SandeepKsinha wrote:
> Hi all,
>
> Looks like we have the same code for RAID 4 and RAID 5, I could see
> the same make_request for both.
>
> Can someone point me in the code, where exactly we differentiate
> between these two. i.e updating checksum block, etc.
>
RAID 4 is really nothing but a block layout algorithm for RAID 5 (which
has four more block layout algorithms.) RAID 6 contains all five under
one "level".
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2009-05-15 16:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-14 16:57 RAID4 and RAID5 Code SandeepKsinha
2009-05-15 1:23 ` Neil Brown
2009-05-15 16:08 ` H. Peter Anvin [this message]
2009-05-15 16:14 ` SandeepKsinha
2009-05-15 16:19 ` H. Peter Anvin
[not found] ` <4A0DB688.7050301@harddata.com>
2009-05-16 4:32 ` SandeepKsinha
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