an a version 4 sstem not mount filesystems created by a version 5 system?

[Lowell Gilbert]

stan <stanb at panix.com> writes:

> The subject really says it all.

Modulo a few missing letters...

>                                 What major feature got added that was worth
> breaking this?

UFS2.

> 
> I _assume_ the oposite is _not_ tur? IE a version 5 system _can_ mount
> filesystems created under V4, right?

Sure.  It can even create UFS1 filesystems if you want.

> Oh, and while I'm at it, how does V5 fit into this picture?

It's the first branch that supported UFS2.