Re: cdrom scsi passthough not working well

Re: cdrom scsi passthough not working well

[Philippe Mathieu-Daudé]

Cc'ing qemu-block@ developers.

On 10/28/20 6:18 AM, daggs wrote:
> Greetings,
> 
> I have a vm running under qemu 5.1.0 with a cdrom scsi passthough into it.
> I can eject the device in and out but when I insert a disc, is isn't detected and the dmesg on the guest is filled with these prints:
> [384216.443262] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> [384216.443268] sr 0:0:0:0: Sense Key : 0xb [current]
> [384216.443272] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
> [384218.504142] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> [384218.504150] sr 0:0:0:0: Sense Key : 0xb [current]
> [384218.504153] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
> [384220.561302] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> [384220.561308] sr 0:0:0:0: Sense Key : 0xb [current]
> [384220.561312] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
> 
> the vm is uefi q35 based, generated by libvirt 6.8.0, the cdrom part is this:
> -blockdev {"driver":"host_device","filename":"/dev/sg0","node-name":"libvirt-2-backend","read-only":true}
> -device scsi-generic,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=libvirt-2-backend,id=hostdev0
> 
> id there something bad with the config or have I encountered a bug?
> 
> Thanks,
> 
> Dagg.
> 

Re: cdrom scsi passthough not working well

[daggs]

Greetings Philippe,

> Sent: Wednesday, February 03, 2021 at 6:48 PM
> From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
> To: "daggs" <daggs@gmx.com>, qemu-discuss@nongnu.org
> Cc: "qemu-devel" <qemu-devel@nongnu.org>, "Qemu-block" <qemu-block@nongnu.org>
> Subject: Re: cdrom scsi passthough not working well
>
> Cc'ing qemu-block@ developers.
> 
> On 10/28/20 6:18 AM, daggs wrote:
> > Greetings,
> > 
> > I have a vm running under qemu 5.1.0 with a cdrom scsi passthough into it.
> > I can eject the device in and out but when I insert a disc, is isn't detected and the dmesg on the guest is filled with these prints:
> > [384216.443262] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> > [384216.443268] sr 0:0:0:0: Sense Key : 0xb [current]
> > [384216.443272] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
> > [384218.504142] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> > [384218.504150] sr 0:0:0:0: Sense Key : 0xb [current]
> > [384218.504153] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
> > [384220.561302] sr 0:0:0:0: ioctl_internal_command return code = 8000002
> > [384220.561308] sr 0:0:0:0: Sense Key : 0xb [current]
> > [384220.561312] sr 0:0:0:0: ASC=0x0 ASCQ=0x6
> > 
> > the vm is uefi q35 based, generated by libvirt 6.8.0, the cdrom part is this:
> > -blockdev {"driver":"host_device","filename":"/dev/sg0","node-name":"libvirt-2-backend","read-only":true}
> > -device scsi-generic,bus=scsi0.0,channel=0,scsi-id=0,lun=0,drive=libvirt-2-backend,id=hostdev0
> > 
> > id there something bad with the config or have I encountered a bug?
> > 
> > Thanks,
> > 
> > Dagg.
> > 
> 

I don't have this issue anymore, however, when I enter the cdrom, the read light is blinking for a long time and when it is done, the disc isn't detected.
/dev/sr0 exists, both the drive and cd are good

Dagg.
>