From: Matthias Schniedermeyer <ms@citd.de>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] Memory errors and and 3TB RAID5 partition
Date: Wed, 16 Jan 2013 13:00:26 +0100 [thread overview]
Message-ID: <20130116120026.GA16868@citd.de> (raw)
In-Reply-To: <20130116112321.GA6637@tansi.org>
On 16.01.2013 12:23, Arno Wagner wrote:
> Hi Frederico,
>
> An alternative is to verify each write. Here you have to be careful
> to empty all buffers and caches before doing it. That is what I
> do for large files.
My M.O. is to make MD5(*) sums of just about every file. So after i move
files around, i just verify the MD5 sums. The amount of data moved is
usually (a lot) bigger than available RAM, so i usually forgo clearing
the cache, otherwise i do a umount/mount-cycle before verifying the MD5
sums.
I'm doing this since a few years ago when i had trouble with a
particular USB2<->Sata chip that had a rare tendency to corrupt a
specific bit-pattern every now and then. Since then i had never any
trouble with data-corruption.
*:
This case doesn't concern security, so MD5 is "good enough".
--
Matthias
next prev parent reply other threads:[~2013-01-16 12:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-16 11:08 [dm-crypt] Memory errors and and 3TB RAID5 partition Federico Foschini
2013-01-16 11:23 ` Arno Wagner
2013-01-16 12:00 ` Matthias Schniedermeyer [this message]
2013-01-16 12:06 ` Federico Foschini
2013-01-16 16:30 ` Karol Babioch
2013-01-16 19:26 ` Matthias Schniedermeyer
2013-01-16 11:24 ` Ralf Ramsauer
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