From: Matthias Urlichs <matthias@urlichs.de>
To: "Majed B." <majedb@gmail.com>
Cc: linux-raid@vger.kernel.org
Subject: Re: Re-map disk sectors in userspace when rewriting after read errors
Date: Wed, 16 Sep 2009 11:44:26 +0200 [thread overview]
Message-ID: <1253094266.6394.5.camel@localhost> (raw)
In-Reply-To: <70ed7c3e0909160231l4e424ff3y4d4615ebb87c0e82@mail.gmail.com>
On Wed, 2009-09-16 at 12:31 +0300, Majed B. wrote:
> I have a question which would probably sound stupid: If I have a bad
> blocks output file from dd_rescue, can I reconstruct a bad sector's
> data by reading the same sector from all disks (using dd if=/dev/sdx
> of=./bbfix_#number bs=512 count=1 skip=bb_number-1), then run an
> normal XOR operation, write zeros to the bad block to force sector
> remap, then dd the XOR output to the said sector?
Well, of course. Assuming that the disk's sector remap works, which was
my problem, and that we're talking about RAID5.
next prev parent reply other threads:[~2009-09-16 9:44 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-15 6:23 Re-map disk sectors in userspace when rewriting after read errors Matthias Urlichs
2009-09-15 6:45 ` berk walker
2009-09-15 7:23 ` Matthias Urlichs
2009-09-15 7:13 ` Alex Butcher
2009-09-15 7:29 ` Matthias Urlichs
2009-09-15 7:37 ` Alex Butcher
2009-09-15 10:48 ` Matthias Urlichs
2009-09-16 9:41 ` Goswin von Brederlow
2009-09-16 13:13 ` Matthias Urlichs
2009-09-18 8:17 ` Majed B.
2009-09-18 8:28 ` Robin Hill
2009-09-18 9:57 ` Majed B.
2009-09-18 10:22 ` Robin Hill
2009-09-18 10:52 ` Majed B.
2009-09-18 11:15 ` Robin Hill
2009-09-18 11:35 ` Matthias Urlichs
2009-09-18 17:44 ` John Robinson
2009-09-18 18:02 ` Greg Freemyer
2009-09-18 20:13 ` Majed B.
2009-10-02 13:55 ` Bill Davidsen
2009-09-15 10:40 ` Majed B.
2009-09-15 10:52 ` Matthias Urlichs
2009-09-15 11:03 ` Majed B.
2009-09-15 17:02 ` Majed B.
2009-09-15 18:05 ` Matthias Urlichs
2009-09-15 18:14 ` Majed B.
2009-09-15 18:44 ` Matthias Urlichs
2009-09-16 9:31 ` Majed B.
2009-09-16 9:44 ` Matthias Urlichs [this message]
2009-09-16 9:52 ` Majed B.
2009-09-16 13:05 ` Alex Butcher
2009-09-16 10:00 ` Robin Hill
2009-09-16 10:07 ` Majed B.
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