md5sum of cd-image

Paul Howarth paul at
Sat Nov 13 13:34:56 UTC 2004

On Sat, 2004-11-13 at 13:24 +0100, Dennis Bjorklund wrote:
> Is the instruction on
> correct? It say you should run
>   dd if=/dev/cdrom bs=2k | md5sum
> to check the md5sum after you have burned the cd. I've tried to burn the
> cd's in different ways using cdrecord (different pad-size) but no matter
> what, I get a I/O-error in the end and a sum that is correct.

That's OK; you get the I/O error when dd attempts to read past the end
of the data on the CD. The md5sum is good, so the CD is too.

> I've used the cd's on two computers to install and on both, the media
> check first failed and then passed when I used ide=nodma. The
> installations I did using nodma, and they seemed to work well. I've not 
> tried to install from them with dma turned on.

Your CDs are OK then.

Paul Howarth <paul at>

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