Randy Kramer wrote:
>
> Main question: If md5sum /dev/cdrom doesn't work, can I recreate the iso
> file (in Linux or Windows (Easy CD Creator)) and get a reliable MD5
> checksum?
>
> Aside: When I run md5sum /dev/cdrom the cdrom spins for a little while
> (2 minutes?) and then I get "Input/output error" -- any hints?
If you are using Mandrake 7.2, be careful that when your IDE CD is in
use nothing else is happening on the same IDE channel as the CDROM.
Seems to be fixed in 8.0.
If you have a second CDROM reader, or access to another PC, try again
in that.
Make sure that the bottom polycarbonate surface is clean and
undamaged. Make sure that the top label surface has not been
damaged in any way (this is where the recording actually is, just
under the label and very vulnerable).
> Background: I bought some game CDs
Linux games?
> and the game fails during one phase
> of play. The "manufacturer" is about to say that my CDs must be bad (no
> scratches, no fingerprints, have had the game for 1 1/2 years with the
> same problem in two different machines). I want to send him the md5
> checksums and have him tell me whether they are right or wrong (before I
> consider paying $10 each for replacement disks). (Along with
> information on how to generate an md5 checksum.)
Yes, do that! But there should be no charge to replace defective
CDROMs within the warranty period.
> Thanks for any help you can offer.
>
> PS: Shortly I will probably run some experiments -- burn a CD from an
> ISO, recreate the ISO from the CD, then compare the checksums, so maybe
> in a few hours (or days) I'll know the answer.
This works here. You don't have to recreate the iso file from the
CD, you can md5sum directly from /dev/cdrom (unmounted).
--
Ron. [au]
Kindly note my new email address: [EMAIL PROTECTED]
and new web site: http://www.ains.net.au/~ronst/
