Safely mount OS X UFS filesystem?

nawcom nawcom at
Sat Jul 7 03:13:09 UTC 2007

i usually use the ufstype=openstep for darwin ufs filesystems, they seem 
to work just fine.

Thor Lancelot Simon wrote:
> Can I, on a system running FreeBSD 6.2 or -current, safely mount a
> UFS filesystem created (and used) on Mac OS 10.4.10?  These filesystems
> are UFS1 (at fslevel 3) with big-endian datastructures in the metadata,
> 4k blocks and 1k fragments, and a few minor oddities in their layout;
> they are pretty much exactly the UFS NeXT used on their workstations.
> If so, Will such a filesystem be safe to mount under OS X after I use it
> on FreeBSD?
> I seem to be able to mount these under NetBSD though the snapshot code
> complains that inodes 64 and 16384 are not dedicated to snapshots.

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