GEOM stacking

[Václav Haisman]

Hi,
I have a running gmirror. Somewhere in its docs there is a mentioning
about writing meta data to the last sector of a disk. Now, I would like
to add PJD's gjournal journaling on top of the mirror. As far as I
understand, it does write some meta data to the last sector of the
journaled device, too. Will it overwrite the gmirror meta data and thus
break the mirror or will it somehow magically work? Does each GEOM layer
make the resulting block device one sector shorter?
--
Vaclav Haisman


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