From: Theodore Tso <tytso@mit.edu>
To: Pavel Machek <pavel@suse.cz>
Cc: "Sitsofe Wheeler" <sitsofe@yahoo.com>,
"Duane Griffin" <duaneg@dghda.com>,
Valdis.Kletnieks@vt.edu,
"Martin MOKREJŠ" <mmokrejs@ribosome.natur.cuni.cz>,
"kernel list" <linux-kernel@vger.kernel.org>,
"Andrew Morton" <akpm@osdl.org>,
mtk.manpages@gmail.com, rdunlap@xenotime.net,
linux-doc@vger.kernel.org
Subject: Re: document ext3 requirements
Date: Sun, 4 Jan 2009 18:30:52 -0500 [thread overview]
Message-ID: <20090104233052.GG22958@mit.edu> (raw)
In-Reply-To: <20090104224052.GE1913@elf.ucw.cz>
On Sun, Jan 04, 2009 at 11:40:52PM +0100, Pavel Machek wrote:
> Not neccessarily.
>
> If I have a bit of precious data and lot of junk on the card, I want
> to copy out the precious data before the card dies. Reading the whole
> media may just take too long.
>
> That's probably very true for rotating harddrives after headcrash...
For a small amount data, maybe; but the number of seeks is often far
more destructive than the amount of time the disk is spinning. And in
practice, what generally happens is the user starts looking around to
make sure there wasn't anything else on the disk worth saving, and now
data is getting copied off based on human reaction time. So that's
why I normally advise users that doing a full image copy of the disk
is much better than, say, "cp -r /home/luser /backup", or cd'ing
around a filesystem hierarchy and trying to save files one by one.
Note also that with SD cards, reading is generally non-destructive and
the time it takes to copy off say, 32 GB really isn't that long.
- Ted
next prev parent reply other threads:[~2009-01-04 23:31 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.pmCH9X+XujDl6RH6/TpkNtsTnbk@ifi.uio.no>
[not found] ` <fa.b62zZFe5e154PhgA+0sdwVXD9F0@ifi.uio.no>
[not found] ` <fa.ZTpiSvxEhp3YJDepiUQs+cU0C98@ifi.uio.no>
[not found] ` <fa.xvvufQC6zTpU9R6vhDl51DR5V7A@ifi.uio.no>
[not found] ` <fa.pkV69eXC76Pb9fnmERdAwXX9OKA@ifi.uio.no>
[not found] ` <fa.hQTLXdIllf+hs4yQb092u6fowq0@ifi.uio.no>
2009-01-04 19:08 ` document ext3 requirements Sitsofe Wheeler
2009-01-04 19:31 ` Theodore Tso
2009-01-04 22:40 ` Pavel Machek
2009-01-04 23:30 ` Theodore Tso [this message]
2009-01-05 3:49 ` Rob Landley
2009-01-05 4:31 ` Robert Hancock
2009-01-05 5:00 ` david
2009-01-05 11:19 ` Alan Cox
2009-01-05 19:00 ` Rob Landley
2009-01-05 19:27 ` Martin K. Petersen
2009-01-06 10:41 ` Matthias Andree
2009-01-06 15:30 ` Theodore Tso
[not found] ` <20090106153020.GB13086__11022.1833143898$1231255950$gmane$org@mit.edu>
2009-01-06 15:40 ` Andi Kleen
2009-01-06 15:57 ` Theodore Tso
2009-01-06 17:31 ` Andi Kleen
2009-01-06 19:31 ` Rob Landley
2009-01-27 13:24 ` Thierry Vignaud
2009-01-27 13:37 ` Alan Cox
2009-01-06 10:36 ` Matthias Andree
[not found] <fa.P4z5CJpM0xT37PWJuOuCHDkO76o@ifi.uio.no>
[not found] ` <fa.eOwOqydZi0qs6K1nmNxBFGQMV40@ifi.uio.no>
[not found] ` <fa.26o5IHCAC3TQdXupl62CLYwQ+Wk@ifi.uio.no>
2009-01-04 23:13 ` Sitsofe Wheeler
2009-01-05 2:51 ` Rob Landley
2009-01-05 3:33 ` Martin K. Petersen
2009-01-05 4:02 ` david
2009-01-05 3:52 ` Rob Landley
[not found] ` <fa.GBkQuKdRj+YRVczlNLFhGvaw3WY@ifi.uio.no>
[not found] ` <fa.rCyCghh/+staAmYi/+gwYvefIS0@ifi.uio.no>
[not found] ` <fa.c5j7jAMUnJPvgI9Oj/VczSDNakE@ifi.uio.no>
[not found] ` <fa.377DMq2lPMyaHxadPnApFSJFoCg@ifi.uio.no>
2009-01-05 20:36 ` Sitsofe Wheeler
2009-01-05 23:09 ` Theodore Tso
[not found] ` <fa.ucJLoSQwk9OAj6T6x60tbWaiTAo@ifi.uio.no>
2009-01-05 22:25 ` Sitsofe Wheeler
2009-01-06 4:08 ` Rob Landley
2009-01-03 12:38 Pavel Machek
2009-01-03 21:17 ` Martin MOKREJŠ
2009-01-03 22:06 ` Pavel Machek
2009-01-03 22:17 ` Duane Griffin
2009-01-03 22:29 ` Pavel Machek
2009-01-03 23:01 ` Martin MOKREJŠ
2009-01-03 23:38 ` Duane Griffin
2009-01-03 23:50 ` Martin MOKREJŠ
2009-01-03 23:58 ` Robert Hancock
2009-01-04 0:08 ` Martin MOKREJŠ
2009-01-04 21:49 ` Ingo Oeser
2009-01-04 0:00 ` Duane Griffin
2009-01-04 0:11 ` Martin MOKREJŠ
2009-01-04 0:41 ` Duane Griffin
2009-01-04 3:52 ` Valdis.Kletnieks
2009-01-04 14:24 ` Duane Griffin
2009-01-04 18:40 ` Theodore Tso
2009-01-04 19:21 ` Geert Uytterhoeven
2009-01-04 19:36 ` Theodore Tso
2009-01-04 19:51 ` Duane Griffin
2009-01-04 21:55 ` Theodore Tso
2009-01-04 22:06 ` Duane Griffin
2009-01-04 22:42 ` Bron Gondwana
2009-01-05 3:22 ` Rob Landley
2009-01-04 0:19 ` Pavel Machek
2009-01-05 2:55 ` Rob Landley
2009-01-04 19:56 ` Rob Landley
2009-01-05 19:16 ` Theodore Tso
2009-01-06 19:20 ` Rob Landley
2009-01-06 10:08 ` Matthias Andree
2009-01-06 15:23 ` Theodore Tso
2009-01-03 23:12 ` Duane Griffin
2009-01-06 10:06 ` Matthias Andree
2009-01-04 2:32 ` Theodore Tso
2009-01-04 22:33 ` Pavel Machek
2009-01-04 13:35 ` Alexander E. Patrakov
2009-01-04 13:53 ` Valdis.Kletnieks
2009-01-04 18:21 ` Michael Tokarev
2009-01-04 18:38 ` Theodore Tso
2009-01-04 22:37 ` Pavel Machek
2009-01-04 23:58 ` Theodore Tso
2009-01-05 11:43 ` Alan Cox
2009-01-07 11:59 ` Rob Landley
2009-01-04 20:10 ` Pavel Machek
2009-01-04 19:49 ` Rob Landley
2009-01-04 22:06 ` Theodore Tso
2009-01-04 22:25 ` Pavel Machek
2009-01-04 23:07 ` Pavel Machek
2009-01-05 1:38 ` Rob Landley
2009-01-04 22:55 ` Pavel Machek
2009-01-05 0:16 ` david
2009-01-05 9:38 ` Pavel Machek
2009-01-05 1:50 ` Rob Landley
2009-01-05 3:20 ` Martin K. Petersen
2009-01-05 9:45 ` Pavel Machek
2009-01-05 11:28 ` Alan Cox
2009-01-05 19:15 ` Martin K. Petersen
2009-01-05 20:19 ` Theodore Tso
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