snapshot consistency when using xfs

Hello LVM folks:
Sorry for sending duplicate email. The previous one
was sent by mistake. My mouse slipped. :-)

Anyway, I am curious to know when using snapshot
with XFS and the system was shut down by power failure
while writing some big file to the original volume, 
(hence a lot of blocks were being written to the 
snapshot at that time i.e. heavy cow operation was
expected) will the snapshot survive such a disaster?

I tried to think about the possible scenario but that
was
beyond of my ability considering my lack of knowledge
on the detailed structure of device mapper/snapshot.

As always, any comment is welcomed. :-)

Thanks very much....


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