Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!gem.mps.ohio-state.edu!ginosko!uunet!acd4!mjb
From: mjb@acd4.UUCP ( Mike Bryan          )
Newsgroups: comp.unix.ultrix
Subject: Re: Can V1.2 file systems be mounted under 3.0
Message-ID: <1989Sep1.125332.9286@acd4.UUCP>
Date: 1 Sep 89 12:53:32 GMT
References: <1444@esat.kuleuven.ac.be> <7802@cbmvax.UUCP>
Reply-To: mjb@acd4.UUCP ( Mike Bryan          )
Organization: Applied Computing Devices, Inc., Terre Haute, IN
Lines: 24

In article <7802@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes:
>In article <1444@esat.kuleuven.ac.be> ELSEN@esat.kuleuven.ac.be (Marc Elsen) writes:
>> 
>>     I will soon be upgrading from Ultrix 1.2 to 3.1 and I was wondering
>> whether V1.2 file systems can still be mounted under Ultrix 3.1.
>> The V3.0 Release Notes mention something about  a change to the
>> Clean Byte value on p2-40.Further it is stated that fsck should be run
>> at least once to make pre 3.0 file systems compatible with Ultrix 3.0.
>
>The clean flag is basically advisory - if there have been no changes to the
>filesystem since it was mounted/unmouted, fsck -p can skip checking it and
>mount doesn't complain when you try to mount it.  You can still mount an
>old (1.2) or "dirty" filesystem by using the "-o force" option to mount.

You don't need to use the "-o force" option to mount.  Assuming you
have the 1.2 filesystems in /etc/fstab, an fsck will automatically be
run on that filesystem when the system is booted.  The fsck will
properly setup the "clean byte", and those filesystems will then be
3.0 filesystems.  No problem!
-- 
Mike Bryan, Applied Computing Devices, 100 N Campus Dr, Terre Haute IN 47802
Phone: 812/232-6051  FAX: 812/231-5280  Home: 812/232-0815
UUCP: uunet!acd4!mjb  ARPA: acd4!mjb@uunet.uu.net
"Did you make mankind after we made you?" --- XTC, "Dear God"