Hi, VirtIO SCSI is a virtualized HBA that offers a couple of advantages over the existing VirtIO block disk devices. Instead of having a vtbdX disk, familiar daX and cdX devices are created like from other SCSI drivers. A single HBA is able to support multiple devices unlike the VirtIO block where there is one disk per PCI device. And SCSI devices from the host are able to be passthrough to the guest.
VirtIO SCSI is relatively new - I think the Linux guest driver first came out as part of the 3.4 kernel from last month - and as a result you need a relatively new QEMU (post-February of this year). Various minor bits of the spec do not seem to be supported by QEMU yet (like event monitoring), but there is stub code in the driver for when support is added. Patch is available at: www.daemoninthecloset.org/~bryanv/patches/freebsd/freebsd_virtio_scsi_1.patch Should apply cleanly to any recent -current, and probably to a -stable with minimal work. _______________________________________________ freebsd-virtualization@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization To unsubscribe, send any mail to "freebsd-virtualization-unsubscr...@freebsd.org"
