[libvirt] A error about live migration with --copy-storage-all

[姚远]

In fedora-13, libvirt is libvirt-0.8.2 and qemu is   qemu-kvm-0.12.3. In
virsh , the command of "migrate --live fedora-13 qemu+ssh://
10.1.10.54/system" is going well. but when I use the command of "migrate
--live --copy-storage-all fedora-13 qemu+ssh://10.1.10.54/system", it show
the error:

internal errorqemu: could not open disk image /home/images/fedora-13.img: No
such file or directory
qemu: could not open disk image /home/images/fedora-13.img: No such file or
directory

"10.1.10.54" is the ip of destination, and fedora-13 is my VM.
I don't know why. My VM "fedora-13" can going well with "virsh start
fedora-13" by "/usr/bin/qemu-kvm". Who do live migration with
"--copy-storage-all" successfully can help me.

What is "--copy-storage-inc  migration with non-shared storage with
incremental copy (same base image shared between source and destination)"?
do that means I also need a shared storage?
The document of this I can find out is too less.
thank you!
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