On Thu, May 28, 2020 at 07:48:57AM +0200, Matthias wrote:
> On a fresh 6.7 installation, mount(8) shows 'type ffs'. Is there any way
> to figure out the version number?
dumpfs /dev/rsdXY | head -1
-Otto
>
>
> On 2020-05-27 22:54, Otto Moerbeek wrote:
> > I got some questions on ffs2 in 6.7. This is to set the record
> > straight, feel free to share on forums like reddit that I do not read,
> > let alone post on.
> >
> > 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.
> >
> > Hope this help in clearing up some of questions people have,
> >
> > -Otto
> >
> >
> >
> >
>
