From: Zan Lynx <zlynx@acm.org>
To: Toby Thain <toby@telegraphics.com.au>
Cc: Jeff Mahoney <jeffm@suse.com>,
ric@emc.com, Christian Kujau <lists@nerdbynature.de>,
kgp <jyotiv@tataelxsi.co.in>,
reiserfs-devel@vger.kernel.org
Subject: Re: bad block management
Date: Fri, 04 Apr 2008 10:12:09 -0600 [thread overview]
Message-ID: <1207325530.7624.2.camel@localhost> (raw)
In-Reply-To: <02D8FA59-0FF5-444C-BAAF-17A4BEA847AF@telegraphics.com.au>
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On Fri, 2008-04-04 at 00:21 -0400, Toby Thain wrote:
> On 3-Apr-08, at 8:14 PM, Zan Lynx wrote:
> > A RAID media verify or a badblocks -n run can usually fix these.
>
> Only if your RAID uses CRCs (most don't).
>
> ZFS is the real answer to undetected corruption.
If one hard disk returns a CRC read error for a block but the other
RAID-1 mirror disk or the parity disk(s) return good blocks, the array
controller should know which data is good and which is bad in order to
rewrite a good copy.
--
Zan Lynx <zlynx@acm.org>
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next prev parent reply other threads:[~2008-04-04 16:12 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-01 5:03 bad block management kgp
2008-04-01 18:55 ` Christian Kujau
2008-04-01 19:32 ` Ric Wheeler
2008-04-01 19:51 ` Jeff Mahoney
2008-04-01 22:11 ` Edward Shishkin
2008-04-02 4:50 ` jyotiv
2008-04-02 10:43 ` Ric Wheeler
2008-04-02 11:22 ` jyotiv
2008-04-02 13:31 ` Ric Wheeler
2008-04-02 13:14 ` Jeff Mahoney
2008-04-04 0:14 ` Zan Lynx
2008-04-04 4:21 ` Toby Thain
2008-04-04 16:12 ` Zan Lynx [this message]
2008-04-04 22:41 ` Toby Thain
2008-04-04 18:58 ` Ric Wheeler
2008-04-04 22:42 ` Toby Thain
2008-04-05 12:31 ` Ric Wheeler
2008-04-05 14:07 ` Toby Thain
2008-04-05 15:08 ` Ric Wheeler
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