KVM guest fails to read the physical DVD-ROM media in the host

Solution Verified - Updated -

Issue

  • When a KVM guest tries to read the physical DVD-ROM media in the host, the following error may occur and the
    guest cannot read the host's DVD-ROM.

    attempt to access beyond end of device
    sr0: rw=0 want=3904520, limit=2097148
    Buffer I/O error on device sr0, logical block 976129
    

    When this issue occurs, the df command shows the correct size in /dev/sr0, but the lsblk command does not.

    # df
    Filesystem           1K-blocks    Used Available Use% Mounted on
    /dev/sr0               3762278 3762278         0 100% /mnt
    
    # lsblk
    sr0                           11:0    1 1024M  0 rom  /mnt
    

Environment

  • Red Hat Enterprise Linux 6
  • qemu-kvm

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