[Pkg-libburnia-devel] Bug#789260: libburn4: Incompatibility with Plextor PX-608CU burner

[Thomas Schmitt]

Hi,

> I suppose it would be also helpful to compare not only kernel versions, but
> also libs versions involved.

Kernel modules for USB, (S)ATA, SCSI, maybe.
Userland libraries should hardly be involved, unless they
impose workload on USB.

Last time i tried to understand SG_IO, i ended up at
the entrance of the i/o elevator. Dunno where the request
leaves that thing and hits the hardware controller driver.

At some point of my current endeavor i will have to find
out why the new kernel shows such a miserable performance
with two concurrent DVD burns. I already read rumors that
it performs SG_IO synchronously in a single queue for all
devices. But i had thought that 2 times 4x DVD speed would
be no problem for a contemporary system.
My olde 2.6 on weaker hardware did it without problems.


Have a nice day :)

Thomas