Re: ISO Burning problems
On Tue, Dec 06, 2005 at 05:09:06PM +0000, antonio giulio wrote:
> I have burned dvd isos (debian, knoppix) with k3b. k3b uses growisofs, but I
> have not found particular options (I have used "Auto" and "DAO"). With
> cdrecord I have burned cd-isos for FreeBSD (sorry I have missed it in prev
> email) with -dao option.
>
> I make test with "md5sum /dev/cdrom" or "cat /dev/cdrom | md5sum".
That often doesn't work on linux due to block driver stupidity unless
burned in dao mode and even then it might not work.
> How Goswin has suggested I have compared isos on hard disk and cd/dvd like
> this:
>
> "diff /dev/cdrom path/file.iso" and "cmp /dev/cdrom path/file.iso" but
> nothing was returned.
No different than the md5sum command given you can not reliably read
from /dev/cdrom raw on linux due to block size issues and trying to read
ahead in the kernel.
> And how Len suggested I have used growisofs directly, but nothing is
> changed.
>
> Is right my way?
Simple way:
mount -o loop image.iso /mnt/image
mount /dev/cdrom /mnt/cdrom
diff -ruN /mnt/image /mnt/cdrom
That compares the file contents without any of the low level device
issues.
Len Sorensen
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