Amount of virtual disks with KVM

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Hi all!

I'm trying to make a migration of a Xen PV virtual machine to KVM. For
this I'm starting a VM with SystemRescueCD [1] of the following way:

# /usr/local/kvm/bin/qemu-system-x86_64 -hda /dev/vm/hermes-disk -boot d \
 -cdrom /space/isos/systemrescuecd-x86-1.3.2.iso -m 512 -daemonize -vnc \
 :2 -k es -localtime -hdb hermes-raiz.raw -hdc hermes-var.raw -net \
 nic,vlan=0,macaddr=00:16:3e:00:00:34 -net tap

Where hermes-disk is the disk that will use the VM in the destination
host, and hermes-raiz.raw and hermes-var.raw are the raw partitions that
was using the Xen PV virtual machine in source host.

My idea is to create the partitions in hermes-disk, to mount the raw
partitions and to do "cp -a" to the partitions created in hermes-disk,
but after boot only hermes-disk and hermes-raiz.raw are exported (like
sda and sdb). Which can be the problem?

Using VIRTIO for the raw partitions I didn't have this problem.

Something similar happened to me with a ISO of Debian netinstall. It
doesn't boot passing three disks with -hdX. But making the installation
with netinstall and two disks and after it have finished and have booted
and added a third disk, the system boots without problems. Will it be
by the same cause?

Thanks in advance for your reply.

Regards,
Daniel

[1] http://www.sysresccd.org/Main_Page
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