From: Matthias Urlichs <matthias@urlichs.de>
To: linux-raid@vger.kernel.org
Subject: Re-map disk sectors in userspace when rewriting after read errors
Date: Tue, 15 Sep 2009 06:23:33 +0000 (UTC) [thread overview]
Message-ID: <h8nbt5$n8p$1@ger.gmane.org> (raw)
Hi,
my problem is that I have a bunch of crappy disks which seem unable to
reliably remap bad areas after a read error.
This obviously makes the read error rewrite feature of our beloved
RAID5/6 code somewhat less than useful.
What I would like to do is to re-map these sectors in userspace -- either
by browbeating the disk into it, or by using the Device Mapper. So I'd
need a way to tell a userspace daemon "this device+block is unreadable",
and wait until said daemon tells the RAID core to go ahead.
I can do the userspace side easily, but my time to dig through the RAID
code and implement that sort of channel in a maintainable way is somewhat
limited. (Plus, I need that code sooner rather than later.)
Would somebody be able to help out? There may be some money in it ...
--
Matthias Urlichs
next reply other threads:[~2009-09-15 6:23 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-15 6:23 Matthias Urlichs [this message]
2009-09-15 6:45 ` Re-map disk sectors in userspace when rewriting after read errors 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
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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