From cset 10921, ioemu: prefix is removed from disk config in
/etc/xen/xmexample.hvm. Now HVM VBD driver is available, this thus raises a
question: how would HVM domain know if one disk is a qemu-dm disk or a VBD disk?
From current implementation, qemu-dm will recognize disk had, hdb, hdc, hdd,
and VBD drive can recognize all disk (had~hdd, hde, hdf ...) . So the result
is: qemu-dm will mount /dev/hda-hdd, and VBD driver will mount the rest
(/dev/hde,...). Actually, VBD will also try to mount /dev/hda..., but failed
with error message "register_blkdev: cannot get major 3 for ide", since the
/hda is already mounted as qemu-dm disk.
This looks a litt bit confusing. So I just wonder: is this the expected
behavor? Do we intend having some explicit mechanism to indentify ioemu disk
and VBD disk?
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