On 06.06.2013 22:44, Frederic Konrad wrote: > On 06/06/2013 12:13, Alexey Kardashevskiy wrote: >> Hi! >> >> For the pseries platform (server PPC64) we do not support PCI hotplug >> yet. >> However we still want to hot plug disks. >> >> As a workaround, we could add multiple SCSI host devices >> (virtio-scsi-pci, >> spapr-vscsi) without any disk attached and later (using qemu console) >> attach drives to them as we do with the "-drive" parameter in the >> command line. >> >> So I enabled CONFIG_PCI_HOTPLUG_OLD=y and tried. >> >> However, drive_add console command works only with PCI what eliminates >> "spapr-vscsi" from the list. Oookay. >> >> Then I tried running qemu with "-device virtio-scsi-pci,id=device0" and >> later doing "drive_add 0 file=virtimg/test1" from the qemu console. This >> time qemu responded with "Device is not a SCSI adapter" what is >> correct as >> nowadays virtio-XXXX-pci devices are not what are they called as they >> simply create underlying virtio-bus, attach a real virtio-XXXX-device >> there >> (which is not PCI) and only then attach disk to non-PCI virtio device. > Hi, > > Seems it's a bug: il should be compatible with the old virtio-scsi-pci. > What's the meaning of the "0" in drive_add command?
It is a PCI slot number, the complete address would include a domain and a bus. > Fred >> >> So as I see there is no way to attach a disk to an existing controller in >> already running qemu. >> >> This is how I add disks to qemu now: >> -device virtio-scsi-pci,id=virtioscsi0 \ >> -drive file=virtimg/fc18guest,if=none,id=drive0,readonly=off, >> format=raw,media=disk,werror=stop,rerror=stop \ >> -device scsi-disk,id=scsidisk0,bus=virtioscsi0.0,channel=0, >> scsi-id=0,lun=0,drive=drive0,removable=off \ >> >> I want to only add "-device virtio-scsi-pci,id=virtioscsi0" to the >> command >> line and do the rest from the qemu console. >> >> Am I missing some useful command from qemu console or anything else? >> Thanks! -- With best regards Alexey Kardashevskiy -- icq: 52150396
