I've successfully managed to boot Debian installer (supplied the installation disc's initrd.gz); however, it is unable to mount the CD image itself, although I have enabled it in the DomU configuration like this:
disk = [ 'phy:/dev/sda5,sda1,w', 'phy:/dev/sda6,sda2,w', 'file:/root/debian-504-amd64-netinst.iso,hdc:cdrom,r' ]
Using the installer's shell I can read the /dev/hdc (which pretends to be the CD drive); however, mounting it fails with:
mount: mounting /dev/hdc on /mnt/ failed: No such file or directory
Dom0 is also Debian Lenny; Xen's version is 3.2.1. Any ideas?