Garnet Ulrich wrote:
Just a quick update. Given that the problem occurs with transfers
greater than 32768, I tried using cdrecord with the -ts=32768 parameter
to limit the largest transfer to one that wouldn't choke my LG
GSA-5120D. cdrecord 2.01 seems to be working OK this way. I blanked a
cd-rw and wrote an iso back to it successfully. I wonder if some kind
of special "driver" could be written to recognize this drive at
connection time and report back to applications (cdrecord or even kernel
dvd-ram code) that the largest supported transfer is only 32768? I
don't know who all the players are that would make this happen
(kernel/scsi/usb/usb-storage/distromakers) or if it is bad idea. I am
just concerned that I have now seemingly addressed this issue for
cdrecord but that I may run up against similar problems with other
software. For example, should I be worried that the kernel support for
using dvd-ram in this drive may also try a >32768 transfer and I won't
have a handy dandy -ts option to fix it?
Alan, I am a much happier user right now. Thank you for all your help
thus far. If you would like me to run any more tests that would be
useful to anyone, I'm very willing to do what I can.
It also happens with my freecom usb cd-rewriter; I wonder if there is
anything in common (e.g. your /proc/bus/usb/devices entry would be
interesting to see). It seems to be generic problem with
usb-scsi/usb-atapi bridges? Or somehow the two devices share some component
in common?
I don't have a -ts=<> option for cdrecord 2.00.3 (since I downgraded and had
it working, I don't really want to upgrade...); will have a look at the
man page of cdrecord 2.01.
I am glad that it is getting somewhere - have been having this problem
for about 6 months now.
Regards,
Hin-Tak
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