Date: Thu, 02 May 1996 10:54:23 +0200 From: sthaug@nethelp.no To: avalon@coombs.anu.edu.au Cc: terry@lambert.org, randy@zyzzyva.com, freebsd-current@freebsd.org, freebsd-hackers@freebsd.org Subject: Re: NetBSD filesystem compatibility Message-ID: <199605020854.KAA20675@trane.uninett.no> In-Reply-To: Your message of "Thu, 2 May 1996 14:59:18 %2B1000 (EST)" References: <199605020502.WAA15041@freefall.freebsd.org>
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> > > Is it safe to assume that a NetBSD filesystem is ufs mountable from > > > a FreeBSD system. I'm about to find this out within the hour, but > > > would appreciate a "heads-up" if anyone has anything to share. > > > > Yes. > > > > Going the other way, you would have to explicitly change the > > label on the FreeBSD swap partition to "swap" for NetBSD to > > recognize it. The on disk structures are the same as for > > 4.4BSD-Lite in both trees. > > Unless something has changed since 2.1R in this area, fsck will not > like the partition information used by NetBSD. > > To stay on the safe side, I try to only mount the NetBSD partitions > read-only and never read-write, if at all possible. I can report on a small experiment I did last weekend. I had an IDE disk which was only partially used (one DOS partition). Running FreeBSD 2.2-960323-SNAP (from a SCSI disk on the same box), I set up a new (0xa5) partition, disklabeled it (/, swap, /usr, /var), and newfs'ed it. I then installed NetBSD-1.1 on the new partition by unpacking the tar files, manually fixing up a few things, manually installing boot blocks - while running FreeBSD. The machine now boots NetBSD-1.1 from the IDE disk just fine. Things seem to work just normal, but I haven't done any extensive testing. The only problem I've noticed is that the NetBSD disklabel program complains about partitions extending past the end of the disk - but it still boots and runs. I can fsck the NetBSD file systems from FreeBSD. Steinar Haug, Nethelp consulting, sthaug@nethelp.no
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