From: Pavel Machek <pavel@ucw.cz>
To: Rik van Riel <riel@redhat.com>
Cc: Ric Wheeler <rwheeler@redhat.com>, Theodore Tso <tytso@mit.edu>,
Florian Weimer <fweimer@bfk.de>,
Goswin von Brederlow <goswin-v-b@web.de>,
Rob Landley <rob@landley.net>,
kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>,
mtk.manpages@gmail.com, rdunlap@xenotime.net,
linux-doc@vger.kernel.org, linux-ext4@vger.kernel.org,
corbet@lwn.net
Subject: Re: [patch] ext2/3: document conditions when reliable operation is possible
Date: Wed, 26 Aug 2009 13:17:52 +0200 [thread overview]
Message-ID: <20090826111751.GC26595@elf.ucw.cz> (raw)
In-Reply-To: <4A94ACDF.30405@redhat.com>
On Tue 2009-08-25 23:32:47, Rik van Riel wrote:
> Pavel Machek wrote:
>
>>> So, would you be happy if ext3 fsck was always run on reboot (at
>>> least for flash devices)?
>>
>> For flash devices, MD Raid 5 and anything else that needs it; yes that
>> would make me happy ;-).
>
> Sorry, but that just shows your naivete.
>
> Metadata takes up such a small part of the disk that fscking
> it and finding it to be OK is absolutely no guarantee that
> the data on the filesystem has not been horribly mangled.
>
> Personally, what I care about is my data.
>
> The metadata is just a way to get to my data, while the data
> is actually important.
Personally, I care about metadata consistency, and ext3 documentation
suggests that journal protects its integrity. Except that it does not
on broken storage devices, and you still need to run fsck there.
How do you protect your data is another question, but ext3
documentation does not claim journal to protect them, so that's up to
the user I guess.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2009-08-26 11:18 UTC|newest]
Thread overview: 309+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-12 9:21 ext2/3: document conditions when reliable operation is possible Pavel Machek
2009-03-12 11:40 ` Jochen Voß
2009-03-21 11:24 ` Pavel Machek
2009-03-21 11:24 ` Pavel Machek
2009-03-12 19:13 ` Rob Landley
2009-03-16 12:28 ` Pavel Machek
2009-03-16 19:26 ` Rob Landley
2009-03-23 10:45 ` Pavel Machek
2009-03-30 15:06 ` Goswin von Brederlow
2009-08-24 9:26 ` Pavel Machek
2009-08-24 9:31 ` [patch] " Pavel Machek
2009-08-24 11:19 ` Florian Weimer
2009-08-24 13:01 ` Theodore Tso
2009-08-24 14:55 ` Artem Bityutskiy
2009-08-24 22:30 ` Rob Landley
2009-08-24 19:52 ` Pavel Machek
2009-08-24 19:52 ` Pavel Machek
2009-08-24 20:24 ` Ric Wheeler
2009-08-24 20:52 ` Pavel Machek
2009-08-24 21:08 ` Ric Wheeler
2009-08-24 21:25 ` Pavel Machek
2009-08-24 22:05 ` Ric Wheeler
2009-08-24 22:22 ` Zan Lynx
2009-08-24 22:44 ` Pavel Machek
2009-08-25 0:34 ` Ric Wheeler
2009-08-24 23:42 ` david
2009-08-24 22:41 ` Pavel Machek
2009-08-24 22:39 ` Theodore Tso
2009-08-24 23:00 ` Pavel Machek
2009-08-25 0:02 ` david
2009-08-25 9:32 ` Pavel Machek
2009-08-25 0:06 ` Ric Wheeler
2009-08-25 9:34 ` Pavel Machek
2009-08-25 15:34 ` david
2009-08-26 3:32 ` Rik van Riel
2009-08-26 11:17 ` Pavel Machek [this message]
2009-08-26 11:29 ` david
2009-08-26 13:10 ` Pavel Machek
2009-08-26 13:43 ` david
2009-08-26 18:02 ` Theodore Tso
2009-08-27 6:28 ` Eric Sandeen
2009-08-27 6:28 ` Eric Sandeen
2009-11-09 8:53 ` periodic fsck was " Pavel Machek
2009-11-09 8:53 ` Pavel Machek
2009-11-09 14:05 ` Theodore Tso
2009-11-09 15:58 ` Andreas Dilger
2009-08-30 7:03 ` Pavel Machek
2009-08-26 12:28 ` Theodore Tso
2009-08-27 6:06 ` Rob Landley
2009-08-27 6:54 ` david
2009-08-27 7:34 ` Rob Landley
2009-08-28 14:37 ` david
2009-08-30 7:19 ` Pavel Machek
2009-08-30 12:48 ` david
2009-08-27 5:27 ` Rob Landley
2009-08-25 0:08 ` Theodore Tso
2009-08-25 9:42 ` Pavel Machek
2009-08-25 9:42 ` Pavel Machek
2009-08-25 13:37 ` Ric Wheeler
2009-08-25 13:42 ` Alan Cox
2009-08-27 3:16 ` Rob Landley
2009-08-25 21:15 ` Pavel Machek
2009-08-25 22:42 ` Ric Wheeler
2009-08-25 22:51 ` Pavel Machek
2009-08-25 23:03 ` david
2009-08-25 23:29 ` Pavel Machek
2009-08-25 23:03 ` Ric Wheeler
2009-08-25 23:26 ` Pavel Machek
2009-08-25 23:40 ` Ric Wheeler
2009-08-25 23:48 ` david
2009-08-25 23:53 ` Pavel Machek
2009-08-26 0:11 ` Ric Wheeler
2009-08-26 0:16 ` Pavel Machek
2009-08-26 0:31 ` Ric Wheeler
2009-08-26 1:00 ` Theodore Tso
2009-08-26 1:15 ` Ric Wheeler
2009-08-26 2:58 ` Theodore Tso
2009-08-26 10:39 ` Ric Wheeler
2009-08-26 10:39 ` Ric Wheeler
2009-08-26 11:12 ` Pavel Machek
2009-08-26 11:28 ` david
2009-08-29 9:49 ` [testcase] test your fs/storage stack (was Re: [patch] ext2/3: document conditions when reliable operation is possible) Pavel Machek
2009-08-29 11:28 ` Ric Wheeler
2009-09-02 20:12 ` Pavel Machek
2009-09-02 20:42 ` Ric Wheeler
2009-09-02 23:00 ` Rob Landley
2009-09-02 23:09 ` david
2009-09-03 8:55 ` Pavel Machek
2009-09-03 0:36 ` jim owens
2009-09-03 2:41 ` Rob Landley
2009-09-03 14:14 ` jim owens
2009-09-04 7:44 ` Rob Landley
2009-09-04 11:49 ` Ric Wheeler
2009-09-05 10:28 ` Pavel Machek
2009-09-05 12:20 ` Ric Wheeler
2009-09-05 13:54 ` Jonathan Corbet
2009-09-05 21:27 ` Pavel Machek
2009-09-05 21:56 ` Theodore Tso
2009-09-02 22:45 ` Rob Landley
2009-09-02 22:49 ` [PATCH] Update Documentation/md.txt to mention journaling won't help dirty+degraded case Rob Landley
2009-09-03 9:08 ` Pavel Machek
2009-09-03 12:05 ` Ric Wheeler
2009-09-03 12:31 ` Pavel Machek
2009-08-29 16:35 ` [testcase] test your fs/storage stack (was Re: [patch] ext2/3: document conditions when reliable operation is possible) david
2009-08-29 16:35 ` david
2009-08-30 7:07 ` Pavel Machek
2009-08-26 12:01 ` [patch] ext2/3: document conditions when reliable operation is possible Ric Wheeler
2009-08-26 12:23 ` Theodore Tso
2009-08-30 7:01 ` Pavel Machek
2009-08-30 7:01 ` Pavel Machek
2009-08-27 5:19 ` Rob Landley
2009-08-27 12:24 ` Theodore Tso
2009-08-27 13:10 ` Ric Wheeler
2009-08-27 13:10 ` Ric Wheeler
2009-08-27 16:54 ` MD/DM and barriers (was Re: [patch] ext2/3: document conditions when reliable operation is possible) Jeff Garzik
2009-08-27 18:09 ` Alasdair G Kergon
2009-09-01 14:01 ` Pavel Machek
2009-09-02 16:17 ` Michael Tokarev
2009-08-29 10:02 ` [patch] ext2/3: document conditions when reliable operation is possible Pavel Machek
2009-08-29 10:02 ` Pavel Machek
2009-08-26 1:15 ` Ric Wheeler
2009-08-26 1:16 ` Pavel Machek
2009-08-26 1:16 ` Pavel Machek
2009-08-26 2:55 ` Theodore Tso
2009-08-26 13:37 ` Ric Wheeler
2009-08-26 13:37 ` Ric Wheeler
2009-08-26 2:53 ` Henrique de Moraes Holschuh
2009-08-26 2:53 ` Henrique de Moraes Holschuh
2009-09-03 9:47 ` Pavel Machek
2009-09-03 9:47 ` Pavel Machek
2009-08-26 3:50 ` Rik van Riel
2009-08-27 3:53 ` Rob Landley
2009-08-27 11:43 ` Ric Wheeler
2009-08-27 20:51 ` Rob Landley
2009-08-27 22:00 ` Ric Wheeler
2009-08-28 14:49 ` david
2009-08-29 10:05 ` Pavel Machek
2009-08-29 20:22 ` Rob Landley
2009-08-29 21:34 ` Pavel Machek
2009-09-03 16:56 ` what fsck can (and can't) do was " david
2009-09-03 19:27 ` Theodore Tso
2009-08-27 22:13 ` raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible) Pavel Machek
2009-08-28 1:32 ` Ric Wheeler
2009-08-28 6:44 ` Pavel Machek
2009-08-28 7:31 ` NeilBrown
2009-08-28 7:31 ` NeilBrown
2009-11-09 10:50 ` Pavel Machek
2009-08-28 11:16 ` Ric Wheeler
2009-09-01 13:58 ` Pavel Machek
2009-08-28 7:11 ` raid is dangerous but that's secret Florian Weimer
2009-08-28 7:23 ` NeilBrown
2009-08-28 12:08 ` raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible) Theodore Tso
2009-08-30 7:51 ` Pavel Machek
2009-08-30 9:01 ` Christian Kujau
2009-09-02 20:55 ` Pavel Machek
2009-08-30 12:55 ` david
2009-08-30 14:12 ` Ric Wheeler
2009-08-30 14:44 ` Michael Tokarev
2009-08-30 16:10 ` Ric Wheeler
2009-08-30 16:35 ` Christoph Hellwig
2009-08-31 13:15 ` Ric Wheeler
2009-08-31 13:16 ` Christoph Hellwig
2009-08-31 13:19 ` Mark Lord
2009-08-31 13:21 ` Christoph Hellwig
2009-08-31 15:14 ` jim owens
2009-09-03 1:59 ` Ric Wheeler
2009-09-03 11:12 ` Krzysztof Halasa
2009-09-03 11:18 ` Ric Wheeler
2009-09-03 13:34 ` Krzysztof Halasa
2009-09-03 13:50 ` Ric Wheeler
2009-09-03 13:59 ` Krzysztof Halasa
2009-09-03 14:15 ` wishful thinking about atomic, multi-sector or full MD stripe width, writes in storage Ric Wheeler
2009-09-03 14:26 ` Florian Weimer
2009-09-03 15:09 ` Ric Wheeler
2009-09-03 23:50 ` Krzysztof Halasa
2009-09-04 0:39 ` Ric Wheeler
2009-09-04 21:21 ` Mark Lord
2009-09-04 21:29 ` Ric Wheeler
2009-09-05 12:57 ` Mark Lord
2009-09-05 13:40 ` Ric Wheeler
2009-09-05 21:43 ` NeilBrown
2009-09-07 11:45 ` Pavel Machek
2009-09-07 13:10 ` Theodore Tso
2010-04-04 13:47 ` fsck more often when powerfail is detected (was Re: wishful thinking about atomic, multi-sector or full MD stripe width, writes in storage) Pavel Machek
2010-04-04 13:47 ` Pavel Machek
2010-04-04 17:39 ` tytso
2010-04-04 17:59 ` Rob Landley
2010-04-04 18:45 ` Pavel Machek
2010-04-04 19:35 ` tytso
2010-04-04 19:29 ` tytso
2010-04-04 23:58 ` Rob Landley
2009-09-03 14:35 ` raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible) david
2009-08-31 13:22 ` Ric Wheeler
2009-08-31 15:50 ` david
2009-08-31 16:21 ` Ric Wheeler
2009-08-31 18:31 ` Christoph Hellwig
2009-08-31 19:11 ` david
2009-08-30 15:05 ` Pavel Machek
2009-08-30 15:20 ` Theodore Tso
2009-08-31 17:49 ` Jesse Brandeburg
2009-08-31 18:01 ` Ric Wheeler
2009-08-31 21:01 ` MD5/6? (was Re: raid is dangerous but that's secret ...) Ron Johnson
2009-08-31 18:07 ` raid is dangerous but that's secret (was Re: [patch] ext2/3: document conditions when reliable operation is possible) martin f krafft
2009-08-31 22:26 ` Jesse Brandeburg
2009-08-31 22:26 ` Jesse Brandeburg
2009-08-31 23:19 ` Ron Johnson
2009-09-01 5:45 ` martin f krafft
2009-08-31 17:49 ` Jesse Brandeburg
2009-09-05 10:34 ` Pavel Machek
2009-09-05 10:34 ` Pavel Machek
2009-08-30 7:51 ` Pavel Machek
2009-08-25 23:46 ` [patch] ext2/3: document conditions when reliable operation is possible david
2009-08-25 23:08 ` Neil Brown
2009-08-25 23:44 ` Pavel Machek
2009-08-26 4:08 ` Rik van Riel
2009-08-26 11:15 ` Pavel Machek
2009-08-27 3:29 ` Rik van Riel
2009-08-25 16:11 ` Theodore Tso
2009-08-25 22:21 ` [patch] document flash/RAID dangers Pavel Machek
2009-08-25 22:21 ` Pavel Machek
2009-08-25 22:33 ` david
2009-08-25 22:40 ` Pavel Machek
2009-08-25 22:59 ` david
2009-08-25 23:37 ` Pavel Machek
2009-08-25 23:48 ` Ric Wheeler
2009-08-26 0:06 ` Pavel Machek
2009-08-26 0:12 ` Ric Wheeler
2009-08-26 0:20 ` Pavel Machek
2009-08-26 0:26 ` david
2009-08-26 0:28 ` Ric Wheeler
2009-08-26 0:38 ` Pavel Machek
2009-08-26 0:45 ` Ric Wheeler
2009-08-26 11:21 ` Pavel Machek
2009-08-26 11:58 ` Ric Wheeler
2009-08-26 12:40 ` Theodore Tso
2009-08-26 13:11 ` Ric Wheeler
2009-08-26 13:11 ` Ric Wheeler
2009-08-26 13:44 ` david
2009-08-26 13:40 ` Chris Adams
2009-08-26 13:47 ` Alan Cox
2009-08-26 14:11 ` Chris Adams
2009-08-27 21:50 ` Pavel Machek
2009-08-29 9:38 ` Pavel Machek
2009-08-26 4:24 ` Rik van Riel
2009-08-26 11:22 ` Pavel Machek
2009-08-26 14:45 ` Rik van Riel
2009-08-29 9:39 ` Pavel Machek
2009-08-29 11:47 ` Ron Johnson
2009-08-29 16:12 ` jim owens
2009-08-25 23:56 ` david
2009-08-26 0:12 ` Pavel Machek
2009-08-26 0:20 ` david
2009-08-26 0:39 ` Pavel Machek
2009-08-26 1:17 ` david
2009-08-26 0:26 ` Ric Wheeler
2009-08-26 0:44 ` Pavel Machek
2009-08-26 0:50 ` Ric Wheeler
2009-08-26 1:19 ` david
2009-08-26 11:25 ` Pavel Machek
2009-08-26 12:37 ` Theodore Tso
2009-08-30 6:49 ` Pavel Machek
2009-08-30 6:49 ` Pavel Machek
2009-08-26 4:20 ` Rik van Riel
2009-08-25 22:27 ` [patch] document that ext2 can't handle barriers Pavel Machek
2009-08-25 22:27 ` Pavel Machek
2009-08-27 3:34 ` [patch] ext2/3: document conditions when reliable operation is possible Rob Landley
2009-08-27 8:46 ` David Woodhouse
2009-08-28 14:46 ` david
2009-08-29 10:09 ` Pavel Machek
2009-08-29 16:27 ` david
2009-08-29 21:33 ` Pavel Machek
2009-08-24 23:00 ` Pavel Machek
2009-08-25 13:57 ` Chris Adams
2009-08-25 22:58 ` Neil Brown
2009-08-25 23:10 ` Ric Wheeler
2009-08-25 23:32 ` NeilBrown
2009-08-25 23:32 ` NeilBrown
2009-08-24 21:11 ` Greg Freemyer
2009-08-24 21:11 ` Greg Freemyer
2009-08-25 20:56 ` Rob Landley
2009-08-25 21:08 ` david
2009-08-25 18:52 ` Rob Landley
2009-08-25 14:43 ` Florian Weimer
2009-08-24 13:50 ` Theodore Tso
2009-08-24 18:48 ` Pavel Machek
2009-08-24 18:48 ` Pavel Machek
2009-08-24 18:39 ` Pavel Machek
2009-08-24 13:21 ` Greg Freemyer
2009-08-24 13:21 ` Greg Freemyer
2009-08-24 18:44 ` Pavel Machek
2009-08-25 23:28 ` Neil Brown
2009-08-25 23:28 ` Neil Brown
2009-08-26 1:34 ` david
2009-08-24 21:11 ` Rob Landley
2009-08-24 21:33 ` Pavel Machek
2009-08-25 18:45 ` Jan Kara
2009-03-16 12:30 ` Pavel Machek
2009-03-16 19:03 ` Theodore Tso
2009-03-23 18:23 ` Pavel Machek
2009-03-23 18:23 ` Pavel Machek
2009-03-16 19:40 ` Sitsofe Wheeler
2009-03-16 21:43 ` Rob Landley
2009-03-17 4:55 ` Kyle Moffett
2009-03-23 11:00 ` Pavel Machek
2009-08-29 1:33 ` Robert Hancock
2009-08-29 13:04 ` Alan Cox
2009-03-16 19:45 ` Greg Freemyer
2009-03-16 19:45 ` Greg Freemyer
2009-03-16 21:48 ` Pavel Machek
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[not found] ` <dddWc-83W-51@gated-at.bofh.it>
[not found] ` <ddefx-5R-37@gated-at.bofh.it>
[not found] ` <ddep7-bI-7@gated-at.bofh.it>
[not found] ` <ddeyR-iy-11@gated-at.bofh.it>
[not found] ` <ddeyR-iy-9@gated-at.bofh.it>
[not found] ` <ddeIu-n9-9@gated-at.bofh.it>
[not found] ` <ddeSb-th-29@gated-at.bofh.it>
[not found] ` <ddoRI-11a-39@gated-at.bofh.it>
[not found] <ciPTu-7f2-47@gated-at.bofh.it>
[not found] ` <clrhX-3R1-13@gated-at.bofh.it>
[not found] ` <dcEc1-33Z-17@gated-at.bofh.it>
[not found] ` <dcFUz-4yN-9@gated-at.bofh.it>
[not found] ` <dcHtf-5XC-17@gated-at.bofh.it>
[not found] ` <dcNSc-2DU-11@gated-at.bofh.it>
[not found] ` <dcOl9-3aC-19@gated-at.bofh.it>
[not found] ` <dcOOd-3qM-33@gated-at.bofh.it>
[not found] ` <dcOXN-3M5-15@gated-at.bofh.it>
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