On Mon, Nov 7, 2011 at 7:13 PM, Paolo Bonzini <pbonz...@redhat.com> wrote: > On 11/07/2011 11:04 AM, Thomas Schmitt wrote: >> In a thread on linux-hotplug, /dev/sg* is declared to be deprecated >> in favor of/dev/bsg/* and /dev/sr*. >> Will this become a problem ? > > I think /dev/bsg is backwards-compatible more or less, but it would help > if it had decent documentation in the kernel tree. > >> I did not succeed with googling for a way to get a block device >> running on top of file=/dev/sg*,if=virtio. > > No, that's not possible with /dev/sg. But I think this helps: > > -drive file=/dev/sr0,if=none,id=scsicd > -device > virtio-blk,drive=scsicd,logical_block_size=2048,physical_block_size=2048 It didn't work for me I started up one os=rh6.1 guest with above options.
On guest: [root@localhost ~]# mount /dev/sr0 /tmp/1 mount: you must specify the filesystem type [root@localhost ~]# > > At least here, dd works with this command line. This probably will > be fixed in QEMU 1.1 (i.e. the release after the next one). > >> The word "passthrough" does not show up in the context of drive >> emulation in any documentation inside the git clone. >> I only see statements about: "passthrough" security model. >> The word "virtio" is mentioned more often, but without much explanation >> of -drive use cases and pitfalls. (Only docs/qdev-device-use.txt >> has some more detailed information.) > > Yes, docs/qdev-device-use.txt helps. "qemu -device virtio-blk,?" too. > >> Is there an external documentation emerging ? >> I would like to read it and contribute my experiences. > > Hopefully, everything would just work. :) > > You can work on wiki.qemu.org in the meanwhile. > > Paolo > > -- Regards, Zhi Yong Wu
