I see you have just added sata to pve-manager,
ahci is unmigratable for the moment,
http://git.qemu.org/?p=qemu.git;a=blob;f=hw/ide/ich.c;h=272b7734b55f5e777d43c272ffbef8cc9ade0ac9;hb=HEAD
static const VMStateDescription vmstate_ahci = {
.name = "ahci",
.unmigratable = 1,
};
so I think we should add a check for live migration