Slip of the keyboard, sorry: I meant writes to the snapshotted device
(not snap itself) are intercepted and written to the spare device,
same as you describe. Good to know your md will be doing that. Could
you elaborate on whether the spare device that you're writing to will
be a plain log of all original blocks, a sparse map like I was talking
about or something entirely different? It would be nice to be able to
snapshot large devices while only using a smallish spare device that
is just large enough to hold the deltas while the backup or suchlike
is taking place.
--Malcolm
-- Malcolm Beattie <mbeattie@sable.ox.ac.uk> Unix Systems Programmer Oxford University Computing Services- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/