Il 22/08/2012 15:13, Stefan Hajnoczi ha scritto:

http://lists.gnu.org/archive/html/qemu-devel/2010-12/msg01741.html

"This is a real problem in practice. IE. the USB CD-ROM on this POWER7
blade limits transfers to 0x1e000 bytes for example and the Linux "sr"
driver on the guest is going to try to give me bigger requests than that
if I don't start limiting them, which will cause all sort of errors."

It cannot be fixed for emulated SCSI HBAs in general but it can for
virtio-scsi.

For disks, this should be fixed simply by using scsi-block instead of
scsi-generic.

CD-ROMs are indeed more complicated because burning CDs cannot be done
with syscalls. :/

Paolo