Re: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt

Prakash K. Cheemplavam
2003-11-05T10:10:36Z

Jens Axboe wrote:
> On Wed, Nov 05 2003, Prakash K. Cheemplavam wrote:
>
>>Jens Axboe wrote:
>>
>>>On Wed, Nov 05 2003, Prakash K. Cheemplavam wrote:
>>>
>>>
>>>>Jens Axboe wrote:
>>>>
>>>>
>>>>
>>>>>On Mon, Nov 03 2003, Prakash K. Cheemplavam wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Hi,
>>>>>>
>>>>>>well I am using k3b0.10.1 and either choosing cdrdao or cdrecord in
>>>>
>>>>DAO mode to burn the cd ends up in non-bit identical copies, wheres ion
>>>>TAO (atleast with my 10x CD-RW I tested) the copy succeded. I tried
>>>>several times, and always got this issue.
>>>>
>>>>
>>>>>>bash-2.05b$ md5sum livecd-2.6_10-23-2003.iso
>>>>>>f73f3a74239dfe94b322b85fd14a306e livecd-2.6_10-23-2003.iso
>>>>>>
>>>>>>TAO:
>>>>>>bash-2.05b$ md5sum /dev/cdroms/cdrom1
>>>>>>f73f3a74239dfe94b322b85fd14a306e /dev/cdroms/cdrom1
>>>>>>
>>>>>>DAO:
>>>>>>bash-2.05b$ md5sum /dev/cdroms/cdrom1
>>>>>>09e7e2a51af4c64685831513fbac18c2 /dev/cdroms/cdrom1
>>>>>
>>>>>
>>>>>
>>>>>Could you please try and cmp the two images, finding out how big the
>>>>>corrupted chunks are and what kind of data they contain?
>>>>
>>>>
>>>>After some further investigation I found out, that the data is NOT
>>>>corrupted, but in a way truncated in DAO mode: When I read out the image
>>>
>>>>from the CD-RW drive, about 5kbyte are missing at the end (and doing
>>>
>>>>several burn, it is always the same amount). Strange enough if I read
>>>>the DAO burnt disk out by my DVD-ROM, the image can be read out
>>>>completely! Can you understand this behaviour? I don't think it is a
>>>>problem of my burner, but rather of the atapi driver?
>>>
>>>
>>>Is actual data missing at the end? If yes, I'd say this looks a lot more
>>>like a cdrecord problem.
>>
>>Sorry, I wasn't precise: The data is on the disc, as my DVD-ROM restores
>>the full image (md5sum matches), but the CD-RW does not.
>
>
> You need to use the pad option to record.

Uhm, could you be more specific? I just use the k3b frontend to burn,
and in the cdrdao manual I couldn't find something useful to it.

SOmething else I noticed with new 2.6tes9-mm2 kernel: Now the mouse
stutters slighty when burning (in atapi mode). I am now using as
sheduler. Shoudl I try deadline or do you this it is something else?
Should I open a new topic?

Prakash