From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: Journaling pointless with today's hard disks?
Date: 24 Nov 2001 17:25:53 -0800 [thread overview]
Message-ID: <9tphb1$n1m$1@cesium.transmeta.com> (raw)
In-Reply-To: <20011124174134.B4372@vega.ipal.net> <200111250024.AAA10086@mauve.demon.co.uk> <20011124185321.C4372@vega.ipal.net>
Followup to: <20011124185321.C4372@vega.ipal.net>
By author: Phil Howard <phil-linux-kernel@ipal.net>
In newsgroup: linux.dev.kernel
>
> By the time the seek completes, the speed is probably too slow to do a
> good write. Options to deal with this include special handling for the
> emergency track to allow reading it back by intentionally slowing down
> the drive for that recovery. Another option is flash disk.
>
And yet another option is to dynamically adjust the data speed fed to
the head, to match the rotation speed of the platter. This assumes
that the rotation speed can be measured, which should be trivial if
they use the rotation to power the drive electronics during shutdown.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2001-11-25 1:26 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-24 13:03 Journaling pointless with today's hard disks? 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 [this message]
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 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
2001-12-03 10:23 ` Matthias Andree
[not found] ` <mailman.1006644421.6553.linux-kernel2news@redhat.com>
2001-11-25 4:20 ` Pete Zaitcev
2001-11-25 13:52 ` Pedro M. Rodrigues
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
-- strict thread matches above, loose matches on Subject: below --
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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