Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.unix.wizards
Subject: Re: Ver. 3.2 filesystems mountable on ver. 4?
Message-ID: <3740@auspex.auspex.com>
Date: 24 Jul 90 18:48:30 GMT
References: <361@dynasys.UUCP>
Organization: Auspex Systems, Santa Clara
Lines: 19

>Does anyone know if filesystems created under 3.2 Unix are mountable
>on ver 4 filesystems?

Err, *which* 3.2 and 4?  I shall assume you mean "System V Release 3.2"
and "System V Release 4".

Yes, both the V7-based S5 file system used in 3.2 and earlier S5
releases, and the 4.3BSD-based UFS file system, are present in S5R4. 
You would mount the file systems created under 3.2 as S5 file systems,
rather than UFS file systems.

>Are they basically the same?

Symlinks were added to the S5 file system in S5R4; other than that, the
on-disk structures should basically be the same (although the
implementations are fairly different in some ways).

The UFS file system's on-disk structures are, of course, quite different
from the S5 file system's.