Borsenkow Andrej wrote:
>
> > A correctly working md5sun is _essential_ to the production of CD-RW
> > disks.
> >
>
> A correct diagnosis is _essential_ to fixing problem. It has nothing to
> do with md5sum:
>
> {pts/1}% dd if=/dev/scd0 of=test.iso bs=1k
> dd: ������ `/dev/scd0': Input/output error
> 54856+0 ������� �������
> 54856+0 �������� �������
>
> dmesg ->
>
> I/O error: dev 0b:00, sector 109712
> I/O error: dev 0b:00, sector 109712
>
> it seems that something evil happened with the way cdrom driver handles
> EOF.
For the first time on each CD, but not the second? Changing the CD
resets it to the first time.
I gave my second diagnosis - the first was defective BURN-free
firmware inside the drive that was stupidly attempting to read ahead
after having read the last sector, this diagnosis 'confirmed' by going
through 3 CD-RW Drives from different manufacturers courtesy of my
friendly dealer. All exhibited the problem and were returned, but I
did not try md5sum twice in these cases. There is no way to do this
test under Windows since the md5sum Windows port is limited to a
single file only.
--
Ron. [au]
