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qemu usb storage emulation
--------------------------
Qemu has two emulations for usb storage devices.
Number one emulates the classic bulk-only transport protocol which is
used by 99% of the usb sticks on the marked today and is called
"usb-storage". Usage (hooking up to xhci, other host controllers work
too):
qemu ${other_vm_args} \
-drive if=none,id=stick,file=/path/to/file.img \
-device nec-usb-xhci,id=xhci \
-device usb-storage,bus=xhci.0,drive=stick
Number two is the newer usb attached scsi transport. This one doesn't
automagically create a scsi disk, so you have to explicitly attach one
manually. Multiple logical units are supported. Here is an example
with tree logical units:
qemu ${other_vm_args} \
-drive if=none,id=uas-disk1,file=/path/to/file1.img \
-drive if=none,id=uas-disk2,file=/path/to/file2.img \
-drive if=none,id=uas-cdrom,media=cdrom,file=/path/to/image.iso \
-device nec-usb-xhci,id=xhci \
-device usb-uas,id=uas,bus=xhci.0 \
-device scsi-hd,bus=uas.0,scsi-id=0,lun=0,drive=uas-disk1 \
-device scsi-hd,bus=uas.0,scsi-id=0,lun=1,drive=uas-disk2 \
-device scsi-cd,bus=uas.0,scsi-id=0,lun=5,drive=uas-cdrom
enjoy,
Gerd
--
Gerd Hoffmann <kraxel@redhat.com>
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