multiple volumes with same name

I moved some disks from a system that failed to a different one that
was already setup.  As a result, several different disks have the same
logical volume.

First question: what happens in this case?  It looks as if the "first"
one it hits gets mounted, and the other is left unmounted.

Second question: I took one of those unmounted volumes and mounted it
under a different name.  Is that OK?  Have I done anything strange
like creating a volume on top of a volume?  The underlying storage
object is an evms LVM region.

A few more ancillary questions:

After I created the new volume name for the region I realized I didn't
want it as a volume at all.  I went to delete it with evmsgui, but it
gave me messages that it was going to erase the underlying
filesystem--even when I did not ask it to go recursively.  Is there a
way to undo just the creation of the volume?

Finally, if I had storage objects that spanned disks (a situation I've
deliberately avoided), would evms have been able to reconstruct them
properly, even with the disks at new hardware locations (i.e., the x
in hdx has changed)?

Thanks.
Ross Boylan

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