OpenBSD 6.7 és az FFS2 FAQ

1. Using 6.7, the *installer* defaults to ffs2 for new filesystems for
   almost all platforms.

2. Using 6.7, a newfs "by hand" still gets you ffs1, unless you use the
   -O2 flag or the partition > 1TB.

3. In -current, newfs defaults to ffs2 for all platforms.

4. ffs2 is faster than ffs2 when creating filesystems and almost always when
   fscking them.

5. ffs2 uses 64-bit timestamps and block numbers. So it handles dates
   after 2038 and much larger partitions. This does not mean that super
   large partitions are always a good idea, there are still drawbacks:
   e.g. they do need lots of memory to fsck, especially when many inodes
   are in use.

6. I have no plans for writing a conversion tool. You can convert an
   ffs1 filesystem to ffs2 using single user mode: umount; dump; newfs
   -O2; restore; mount. Or see it as an opportunity to reinstall and
  get a nice clean system without cruft collected over the years.