graid5 or gvinums - bootable?

[Howard Goldstein]

Apologies in advance for the dumb question.  I request a reality check
here as it takes a few hours (on graid5 at least) on my hardware for the
provider to sync and this is on a production box I can't take down for
too long.

Q: Should a graid5 or gvinum provider be expected to be bootable,
assuming the prover's partition table has an active bootable partition
containing a properly bsdlabeled 'a' slice with the /boot subdirectories
in it (i.e., all of the stuff you normally need in an ordinary, non-geom
 system to have a bootable slice)?

Teh googling is somewhat helpful indicating that the boot loader can now
deal with the GEOM'd gvinum as the boot device, and of course it works
with gmirror but that's not really surprising since that provider
wouldn't doesn't have its /boot slice striped into ribbons across
multiple consumers like graid5 and gvinum in raid-5.