Mark writes:
> On Tue, 2004-02-03 at 17:28, Marshal Newrock wrote:
>> On Tue, 3 Feb 2004, Mark Knecht wrote:
>>> Gentoo2 root # dd if=/dev/cdrom of=EXILE_DISK_1.iso
>>> dd: reading `/dev/cdrom':Input/oupuut error
>>> 3304+0 records in
>>> 3304+0 records out
>>> Gentoo2 root #
>>
>> That's correct. You get an I/O error when it hits the end of the disk.
>> If you mount the .iso on loopback, you'll see it's complete.
>>
>> readcd (which I think comes with cdrtools) also does a similar thing.
readcd also complains about the end of the disk, it's always the
second or third last block. This block contains no real data, so the
ISO will be okay, but it makes verifying the CD difficult. I read this
does not necessarily happen, but for me it does.
> That's really interesting. Can you explain 'mounting on loopback'? What
> is that? I only have one Linux book (Linux in a Nutshell) and it doesn't
> have loopback in the index.
This allows to mount an ISO image instead of a real CD:
mount -t iso9660 -o loop EXILE_DISK_1.iso /mnt/tmp
You need to have loopback device compiled into the kernel (or as
module).
Alex
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