xen discuss - Sep 2008 - zpool import of bootable root pool renders it unbootable

I am running OpenSolaris 2008.05 as a PV guest under Xen.  If you import the
bootable root pool of a VM into another Solaris VM, the root pool is no longer
bootable.

It is related to the device associated to the pool, which is originally c4d0s0,
but on import (-f) becomes c0d2s0 in this case.  Afterwards, booting the
original image results in a kernel panic because, I think, zfs_mountroot()
cannot mount the root path (which is evidently now wrong).

I this fixable?  How does one "mount" (import) a bootable zpool
without wrecking it?  This is something that is commonly done under
virtualization platforms, e.g., to manage the contents of a VM from another VM,
or to perform a file-system level copy of the contents of a VM to another
device.

Any insight would be appreciated.
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