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Date:      Wed, 25 Oct 2000 19:09:30 +0200 (CEST)
From:      Marius Bendiksen <mbendiks@eunet.no>
To:        Dag-Erling Smorgrav <des@ofug.org>
Cc:        arch@FreeBSD.ORG
Subject:   Re: Ideas concerning fsck
Message-ID:  <Pine.BSF.4.05.10010251906240.54726-100000@login-1.eunet.no>
In-Reply-To: <xzpu2a2s568.fsf@flood.ping.uio.no>

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> > We can get around the need for fstab by using the bootfs idea that AIX and
> > others use (Poul-Henning has suggested this also in connection with DEVFS)
> > to get less magic in the boot sequence.
> I'm not familiar with the concept of bootfs - can somebody enlighten
> me?

Certainly.

A bootfs is basically a filesystem that the system can boot from, which
will be in a safe state, because changes are not written back to disk. One
example would be when you make an MFS image and boot from it, the other
would be doing SCO-style stripped down fs'es which are mounted read-only.

The advantage is that you can then hardwire rootvp to that filesystem, and
have files stuck on it to intelligently discover how to bring up the
system correctly, without doing lots of magic to discover what devices are
available for use, and which one you want to boot from, etc.

Also, as the state is always consistant, you have no problem with stuff
like depending on the validity of the contents of a file, and you don't
need to fsck / seperately from the rest of the volumes.

Marius



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