On 02/13/2012 02:18 PM, Michael S. Tsirkin wrote: > On Tue, Feb 14, 2012 at 12:13:36AM +1100, ronnie sahlberg wrote: >> On Tue, Feb 14, 2012 at 12:00 AM, Michael S. Tsirkin <m...@redhat.com> wrote: >>> On Mon, Feb 13, 2012 at 02:54:03PM +0200, Dor Laor wrote: >>>> Only if you use the pci multi-function option but that kills >>>> standard hot unplug >>> >>> It doesn't kill it as such, rather you can't unplug luns individually. >> >> Isnt that just a consequence of the current implementation rather than >> a SCSI limitation? > > Yes. > >> A different way to do hoplug could be to flag all devices as removable >> in the standard inq page then >> leave the LUN there persistently and what you remove/add is not the >> LUN device itself but just the media in the device. >> >> Instead of hot-plug remove the LUN, hot-plug becomes "media eject" or >> "media insert". >> The device remains present all time, you never remove it, but instead >> hot-plug controls if the media is present or not. >> >> >> This would require implementing at least START_STOP_UNIT and >> PREVENT_ALLOW_MEDIUM_REMOVAL opcode emulation from SBC. >> >> >> regards >> ronnie sahlberg > > That would work. > Or we simply use the Peripheral Qualifier that the device is gone; eg we could simply set PQ = 1, return sense code 0x25/00 and be done with ...
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