Success.  What I did was boot to Digital UNIX, make an fs, then
boot to NetBSD and mount that fs and then copy all the stuff from
my NetBSD fs to the newly made Digital UNIX one.  Rebooted into
Digital UNIX and fsck'd the Digital UNIX fs and all seems well.

Thanks for your help :)
Nick

At 07:37 PM 9/1/99 +0200, Matthias Drochner wrote:
>
>nmanisca@vt.edu said:
>> This fs was created under NetBSD 1.3.3.  I can mount this  fs under
>> Digital UNIX 4.0D but it says it's a dirty fs.  I found out the hard
>> way that if you fsck it under Digital UNIX you will destroy it :( 
>
>I've played with this a while ago. What I found is that the DU fs
>looks like an old-style BSD fs. One can mount it from NetBSD,
>it will be recognized by the compatibility code. The other way
>doesn't work.
>It might be worth a try to create an old style fs with newfs -O
>on NetBSD and mount it from DU. (I didn't test it!)
>
>best regards
>Matthias
>
>
>