Hi, Dan. Thank you for the answer.
What where you running in order to change the CDROM backing image ?
I used physical CD-ROM.
xm block-configure ?
I didn't use "xm block-configure". So, I used "xm block-configure". However, the problem has not been solved. I executed the following commands. xm block-configure domid phy:/dev/cdrom hdc:cdrom r and xm block-configure domid phy:/dev/hdc hdc:cdrom r Thanks, Tomohiro Takahashi