From: Ruben Garcia <ruben@ugr.es>
To: linux-kernel@vger.kernel.org
Subject: loop device changes the block size and causes misaligned accesses to the real device, which can't be processed
Date: Wed, 07 Jan 2004 18:03:48 +0100 [thread overview]
Message-ID: <3FFC3BF4.6080105@ugr.es> (raw)
The loop device advertises a block size of 1024 even when configured
over a cdrom.
When burning a ext2 on a cd, and mounting it directly, I get:
blocksize=2048;
when I losetup /dev/loop0 /dev/cdrom, and then try to mount, I get:
blocksize=1024; and then misaligned transfer; this results in not being
able to read the superblock.
The loop device should be changed to export the same blocksize of the
underlying device
or
to be able to handle the different blocksize and ask the real disk for
the hard sectors; then split them and send them up.
This is needed for crypto, or backup won't mount. (Worked on 2.4.21+Old
Cryptoapi)
next reply other threads:[~2004-01-07 17:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-07 17:03 Ruben Garcia [this message]
2004-01-07 18:12 ` loop device changes the block size and causes misaligned accessesto the real device, which can't be processed Jari Ruusu
2004-01-12 4:12 ` Bill Davidsen
2004-01-08 4:04 ` [PATCH] Re: loop device changes the block size and causes misaligned accesses to " Ben Slusky
2004-01-08 10:45 ` Ruben Garcia
2004-01-12 14:12 ` Ruben Garcia
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