From: "H. Peter Anvin" <hpa@zytor.com>
To: Guy <bugzilla@watkins-home.com>
Cc: 'Jim Paris' <jim@jtan.com>, 'Neil Brown' <neilb@cse.unsw.edu.au>,
linux-raid@vger.kernel.org
Subject: Re: RAID-6: help wanted
Date: Fri, 29 Oct 2004 14:33:47 -0700 [thread overview]
Message-ID: <4182B73B.7030002@zytor.com> (raw)
In-Reply-To: <200410292121.i9TLLFN14796@www.watkins-home.com>
Guy wrote:
> I took a look at your paper. It's magic! :)
> My head hurts. :(
>
> Ok, I understand that 27 disks is the limit. But is that usable? Would it
> be too slow? The disk IO seems unreasonable with 27 disks.
Shouldn't be too different from RAID-5, at least as long as you have
reasonably large I/O transactions.
However, unless someone can actually test it out, it's hard to say.
Note that supporting RMW on RAID-6 is definitely a possibility; I tried it
once on a 6-disk configuration (the only one I have) and it was slower.
-hpa
next prev parent reply other threads:[~2004-10-29 21:33 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-23 23:46 RAID-6: help wanted H. Peter Anvin
2004-10-24 5:26 ` Brad Campbell
2004-10-24 6:46 ` Jim Paris
[not found] ` <417B546C.3050706@zytor.com>
2004-10-24 7:09 ` H. Peter Anvin
2004-10-24 7:17 ` H. Peter Anvin
2004-10-24 7:18 ` Brad Campbell
2004-10-25 5:41 ` Neil Brown
2004-10-25 6:20 ` Jim Paris
2004-10-25 6:24 ` Neil Brown
2004-10-25 6:33 ` Jim Paris
2004-10-25 14:23 ` H. Peter Anvin
2004-10-27 3:38 ` Neil Brown
2004-10-27 5:23 ` H. Peter Anvin
2004-10-27 6:00 ` Jim Paris
2004-10-27 6:03 ` H. Peter Anvin
2004-10-28 1:17 ` H. Peter Anvin
2004-10-28 16:00 ` Jim Paris
2004-10-28 17:48 ` H. Peter Anvin
2004-10-28 17:49 ` H. Peter Anvin
2004-10-29 0:43 ` Neil Brown
2004-10-29 11:48 ` Jim Paris
2004-10-29 12:56 ` Guy
2004-10-29 18:15 ` Jim Paris
2004-10-29 19:04 ` H. Peter Anvin
2004-10-29 19:21 ` Jim Paris
2004-10-29 19:33 ` H. Peter Anvin
2004-10-29 20:28 ` Guy
2004-10-29 20:32 ` H. Peter Anvin
2004-10-29 21:21 ` Guy
2004-10-29 21:33 ` H. Peter Anvin [this message]
2004-10-29 12:29 ` Guy
2004-10-27 5:56 ` H. Peter Anvin
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