Re: Strange remount behaviour with ext3-2.4-0.9.4

[Alan Cox]

> more-or-less need need a tree-based fs and reference counting for all
> the magic bits).  In fact, doing it as the fs layer means you could
> have r/w snapshots with COW semantics.

You dont want r/w snapshots for archiving. An archive of a previous date is
worthless if it can't be absolutely utterly and definitively read only.

It is hard to do well, but its an important item. One possiiblity is to do
it by replaying the log to a r/w snapshot (in ram) over a r/o snapshot (on
stable media)