From: John Robinson <john.robinson@anonymous.org.uk>
To: "Martin K. Petersen" <martin.petersen@oracle.com>
Cc: "Pasi Kärkkäinen" <pasik@iki.fi>,
"Roy Sigurd Karlsbakk" <roy@karlsbakk.net>,
"Linux Raid" <linux-raid@vger.kernel.org>
Subject: Re: Checksumming RAID? / SCSI SAS T10 PI and DIF/DIX / T13 SATA EPP
Date: Thu, 06 Dec 2012 11:10:08 +0000 [thread overview]
Message-ID: <50C07D10.3000207@anonymous.org.uk> (raw)
In-Reply-To: <yq1vccgjp4o.fsf@sermon.lab.mkp.net>
On 05/12/2012 19:05, Martin K. Petersen wrote:
>>>>>> "Pasi" == Pasi Kärkkäinen <pasik@iki.fi> writes:
> Pasi> (Added CC to Martin in the case he has some thoughts about generic
> Pasi> Linux checksumming RAID without T10 PI disks..)
>
> There have been a few attempts at a checksumming DM target. However, I
> think btrfs is a much better solution for this stuff.
I think there's room for both. Checksumming at the block level, below md
RAID so presumably in a DM target, could help avoid silent data
corruption in such a way that the md layer could reconstruct valid data.
Checksumming at the filesystem level doesn't give you reconstruction -
unless you add redundancy/RAID functions into the filesystem, which is a
whole other discussion.
Cheers,
John.
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prev parent reply other threads:[~2012-12-06 11:10 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-26 13:27 Checksumming RAID? Roy Sigurd Karlsbakk
2012-11-27 9:45 ` David Brown
2012-11-27 10:17 ` Bernd Schubert
2012-11-27 11:20 ` David Brown
2012-11-27 11:39 ` Roy Sigurd Karlsbakk
2012-11-27 12:37 ` David Brown
2012-11-27 13:09 ` Roy Sigurd Karlsbakk
2012-11-27 13:20 ` David Brown
2012-11-27 13:56 ` Roy Sigurd Karlsbakk
2012-11-27 14:34 ` David Brown
2012-11-27 20:49 ` Stan Hoeppner
2012-11-28 10:58 ` Roy Sigurd Karlsbakk
2012-11-27 12:31 ` Bernd Schubert
2012-11-27 13:05 ` David Brown
2012-11-27 18:53 ` Chris Murphy
2012-11-27 19:27 ` Roy Sigurd Karlsbakk
2012-11-27 19:50 ` Chris Murphy
2012-11-28 10:56 ` Roy Sigurd Karlsbakk
2012-11-28 10:59 ` Roy Sigurd Karlsbakk
2012-11-28 13:25 ` Drew
2012-11-28 17:51 ` Roy Sigurd Karlsbakk
2012-11-28 19:16 ` Chris Murphy
2012-11-28 19:08 ` Chris Murphy
2012-11-28 19:18 ` Roy Sigurd Karlsbakk
2012-11-28 20:02 ` Chris Murphy
2012-11-27 13:54 ` Joe Landman
2012-11-27 18:48 ` Chris Murphy
2012-11-27 19:36 ` Chris Murphy
2012-12-03 12:24 ` Pasi Kärkkäinen
2012-12-03 14:09 ` Checksumming RAID? / SCSI SAS T10 PI and DIF/DIX / T13 SATA EPP Pasi Kärkkäinen
2012-12-05 19:05 ` Martin K. Petersen
2012-12-06 11:10 ` John Robinson [this message]
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