From: Mikael Pettersson <mikpe@csd.uu.se>
To: linux-kernel@vger.kernel.org, tmolina@home.com
Subject: Re: problem with dd for floppy under 2.4.0
Date: Tue, 23 Jan 2001 13:08:54 +0100 (MET) [thread overview]
Message-ID: <200101231208.NAA29008@harpo.it.uu.se> (raw)
On Mon, 22 Jan 2001 23:23:36 -0600 (CST), Thomas Molina wrote:
>[1.] One line summary of the problem: seek= parameter for dd under 2.4.0
>gives permission denied error
>[2.] Full description of the problem/report:I was creating a new
>root+boot disk for 2.4.0 this evening. I issued the command:
>dd if=/tmp/rootfs.gz of=/dev/fd0 bs=1k seek=335
>
>and got the error message:
>dd: /dev/fd0: Permission denied
There's a known bug in dd where it incorrectly attempts to truncate
the output file even though it's a block device. In kernels older
than 2.4.0-test10 or so it got away with this, but now the kernel
correctly returns an error.
Use the 'conv=notrunc' option to dd to fix this, i.e.
dd if=rootfs.gz of=/dev/fd0 bs=1k conv=notrunc seek=XXX
/Mikael
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next reply other threads:[~2001-01-23 12:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-23 12:08 Mikael Pettersson [this message]
2001-01-25 18:27 ` Jamie Lokier
-- strict thread matches above, loose matches on Subject: below --
2001-01-23 5:23 Thomas Molina
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