Qemu doesn't implement SCSI READ DISC INFORMATION command (0x51) Qemu reports: SK=5h/ASC=20h/ACQ=00h

[Jasper Hartline]

# /lib/udev/cdrom_id --debug /dev/sr0
/lib/udev/cdrom_id --debug /dev/sr0
main: probing: '/dev/sr0'
cd_inquiry: INQUIRY: [QEMU ][QEMU DVD-ROM ][0.12]
cd_profiles: GET CONFIGURATION: size of features buffer 0x0010
cd_profiles: GET CONFIGURATION: feature 'profiles', with 2 entries
feature_profiles: profile 0x10 dvd_rom
feature_profiles: profile 0x08 cd_rom
cd_profiles: current profile 0x08
cd_profiles: profile 0x08 media_cd_rom
info_scsi_cmd_err: READ DISC INFORMATION failed with SK=5h/ASC=20h/ACQ=00h
ID_CDROM=1
ID_CDROM_CD=1
ID_CDROM_DVD=1
ID_CDROM_MRW=1
ID_CDROM_MRW_W=1
ID_CDROM_MEDIA=1
ID_CDROM_MEDIA_CD=1

qemu reports: ASC=20h/ACQ=00h

The scsi command is 0x51.
see page page 91:
http://www.13thmonkey.org/documentation/SCSI/x3_304_1997.pdf

[Jasper Hartline (jasper-hartline)]

Curious if anyone has any information on this, an idea of if it would be implemented, or when if ever.
If it won't be implemented, it would be important also.

[Stefan Hajnoczi (stefanha)]

Unable to reproduce on qemu.git and RHEL 6 x86_64 install CD. /lib/udev/cdrom_id completes successfully and does not print the info_scsi_cmd_err.

qemu.git d66bddd7a4535cca3fc9e98c3195a7411779693c

$ x86_64-softmmu/qemu-system-x86_64 -enable-kvm -m 512 -cdrom rhel6.iso

Please check that this issue is still present. If yes, please post more information about your configuration (exact QEMU version, qemu command-line, guest OS and version).