From: Pavel Machek <pavel@suse.cz>
To: linux-kernel@vger.kernel.org
Subject: Re: Journaling pointless with today's hard disks?
Date: Tue, 27 Nov 2001 02:39:24 +0000 [thread overview]
Message-ID: <20011127023923.A38@toy.ucw.cz> (raw)
In-Reply-To: <20011125133020.C1811@emma1.emma.line.org> <20011125150433.CEAE889CAD@pobox.com> <20011125173125.A13119@emma1.emma.line.org>
In-Reply-To: <20011125173125.A13119@emma1.emma.line.org>; from matthias.andree@stud.uni-dortmund.de on Sun, Nov 25, 2001 at 05:31:25PM +0100
Hi!
> > "Power off during write operations may make an incomplete sector which
> > will report hard data error when read. The sector can be recovered by a
> > rewrite operation."
>
> So the proper defect management would be to simply initialize the broken
> sector once a fsck hits it (still, I've never seen disks develop so many
> bad blocks so quickly as those failed DTLA-307045 drives I had).
>
> Note, the specifications say that the write cache setting is ignored
> when the drive runs out of spare blocks for reassignment after defects
> (so that the drive can return the error code right away when it cannot
> guarantee the write actually goes to disk).
They should turn off write-back after number-of-spare-block < cache-size,
otherwise they are not safe.
Pavel
--
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
next prev parent reply other threads:[~2001-12-02 20:30 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1006644421.6553.linux-kernel2news@redhat.com>
2001-11-24 13:03 ` Florian Weimer
2001-11-24 13:40 ` Rik van Riel
2001-11-24 16:36 ` Phil Howard
2001-11-24 17:19 ` Charles Marslett
2001-11-24 17:31 ` Florian Weimer
2001-11-24 17:41 ` Matthias Andree
2001-11-24 19:20 ` Florian Weimer
2001-11-24 19:29 ` Rik van Riel
2001-11-24 22:51 ` John Alvord
2001-11-24 23:41 ` Phil Howard
2001-11-25 0:24 ` Ian Stirling
2001-11-25 0:53 ` Phil Howard
2001-11-25 1:25 ` H. Peter Anvin
2001-11-25 1:44 ` Sven.Riedel
2001-11-24 22:28 ` H. Peter Anvin
2001-11-25 4:49 ` Andre Hedrick
2001-11-24 23:04 ` Pedro M. Rodrigues
2001-11-24 23:23 ` Stephen Satchell
2001-11-24 23:29 ` H. Peter Anvin
2001-11-26 18:05 ` Steve Brueggeman
2001-11-26 23:49 ` Martin Eriksson
2001-11-27 0:06 ` Andreas Dilger
2001-11-27 0:16 ` Andre Hedrick
2001-11-27 7:38 ` Andreas Dilger
2001-11-27 11:48 ` Ville Herva
2001-11-27 0:18 ` Jonathan Lundell
2001-11-27 1:01 ` Ian Stirling
2001-11-27 1:33 ` H. Peter Anvin
2001-11-27 1:57 ` Steve Underwood
2001-11-27 5:04 ` Stephen Satchell
2001-11-25 4:20 ` Pete Zaitcev
2001-11-25 12:30 ` Matthias Andree
2001-11-25 15:04 ` Barry K. Nathan
2001-11-25 16:31 ` Matthias Andree
2001-11-27 2:39 ` Pavel Machek [this message]
2001-12-03 10:23 ` Matthias Andree
2001-11-25 9:14 ` Chris Wedgwood
2001-11-25 22:55 ` Daniel Phillips
2001-11-26 16:59 ` Rob Landley
2001-11-26 20:30 ` Andre Hedrick
2001-11-26 20:35 ` Rob Landley
2001-11-26 23:59 ` Andreas Dilger
2001-11-27 0:24 ` H. Peter Anvin
2001-11-27 0:52 ` H. Peter Anvin
2001-11-27 1:11 ` Andrew Morton
2001-11-27 1:15 ` H. Peter Anvin
2001-11-27 16:59 ` Matthias Andree
2001-11-27 16:56 ` Matthias Andree
2001-11-27 1:23 ` Ian Stirling
2001-11-26 23:00 ` Rob Landley
2001-11-27 2:41 ` H. Peter Anvin
2001-11-27 0:19 ` Rob Landley
2001-11-27 23:35 ` Andreas Bombe
2001-11-28 14:32 ` Rob Landley
2001-11-27 3:39 ` Ian Stirling
2001-11-27 7:03 ` Ville Herva
2001-11-27 16:50 ` Matthias Andree
2001-11-27 20:31 ` Rob Landley
2001-11-28 18:43 ` Matthias Andree
2001-11-28 18:46 ` Rob Landley
2001-11-28 22:19 ` Matthias Andree
2001-11-29 22:21 ` Pavel Machek
2001-12-01 10:55 ` Jeff V. Merkey
2001-12-02 0:08 ` Matthias Andree
2001-12-03 20:04 ` Pavel Machek
2001-11-26 20:53 ` Richard B. Johnson
2001-11-26 21:18 ` Journaling pointless with today's hard disks? [wandering OT] Rob Landley
2001-11-27 0:32 ` Journaling pointless with today's hard disks? H. Peter Anvin
2001-11-27 16:39 ` Matthias Andree
2001-11-27 17:42 ` Martin Eriksson
2001-11-28 16:35 ` Ian Stirling
2001-11-26 17:14 ` Steve Brueggeman
2001-11-26 20:36 ` Andre Hedrick
2001-11-26 21:14 ` Steve Brueggeman
2001-11-26 21:36 ` Andre Hedrick
2001-11-27 16:36 ` Steve Brueggeman
2001-11-27 20:04 ` Bill Davidsen
2001-11-27 21:28 ` Wayne Whitney
2001-11-27 21:52 ` Andre Hedrick
2001-11-28 11:53 ` Pedro M. Rodrigues
2001-11-25 13:52 ` Pedro M. Rodrigues
2001-11-25 1:20 dnu478nt5w@mailexpire.com
2001-11-28 14:36 Galappatti, Kishantha
2001-11-28 17:22 David Balazic
2001-11-28 23:25 Frank de Lange
2001-11-29 1:52 ` Matthias Andree
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