On Sun, Apr 11, 2004 at 09:40:44AM -0700, Simon J. Gerraty wrote:
> Hmmm so its impossible to do test boots of 2.0 or current on
> a 1.6.2 box?

No. Thanks to Darrin's work you can now exactly do that.
I just tested it: create a file system on 1.6.2, boot 2.0_BETA, fsck -f
the new file system - just works, no complaints.

But: if you have test booted a -current kernel in the broken period between
import of the FFSv2 changes and Darrins fixes to it, the -current kernel
will have munged your super block in a way that 1.6.2  ignores. This was
a bug. And it's unrecoverable, unless someone volunteers to write code
to downgrade the superblocks from the munged state to the old (pre
FFSv2-import) state.

Martin