root / docs / usb-storage.txt @ ff5928d0
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qemu usb storage emulation |
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QEMU has two emulations for usb storage devices. |
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Number one emulates the classic bulk-only transport protocol which is |
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used by 99% of the usb sticks on the marked today and is called |
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"usb-storage". Usage (hooking up to xhci, other host controllers work |
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too): |
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qemu ${other_vm_args} \
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-drive if=none,id=stick,file=/path/to/file.img \ |
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-device nec-usb-xhci,id=xhci \ |
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-device usb-storage,bus=xhci.0,drive=stick |
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Number two is the newer usb attached scsi transport. This one doesn't |
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automagically create a scsi disk, so you have to explicitly attach one |
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manually. Multiple logical units are supported. Here is an example |
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with tree logical units: |
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qemu ${other_vm_args} \
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-drive if=none,id=uas-disk1,file=/path/to/file1.img \ |
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-drive if=none,id=uas-disk2,file=/path/to/file2.img \ |
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-drive if=none,id=uas-cdrom,media=cdrom,file=/path/to/image.iso \ |
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-device nec-usb-xhci,id=xhci \ |
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-device usb-uas,id=uas,bus=xhci.0 \ |
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-device scsi-hd,bus=uas.0,scsi-id=0,lun=0,drive=uas-disk1 \ |
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-device scsi-hd,bus=uas.0,scsi-id=0,lun=1,drive=uas-disk2 \ |
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-device scsi-cd,bus=uas.0,scsi-id=0,lun=5,drive=uas-cdrom |
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enjoy, |
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Gerd |
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-- |
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Gerd Hoffmann <kraxel@redhat.com> |