Date: Thu, 5 Oct 1995 16:30:51 -0700 (PDT) From: bmk@dtr.com To: serges@umr.edu (Doug S.) Cc: freebsd-questions@freefall.freebsd.org Subject: Re: tunefs Message-ID: <199510052330.QAA00567@everest> In-Reply-To: <m0t0vXK-0004I6C@nero.x10siv.org> from "Doug S." at Oct 5, 95 02:00:53 pm
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> Is there a way under FBSD to 'tunefs' the / filesystem, WITHOUT
> creating another filesystem and without making an existing filesystem
> bootable?
(This is all to the best of my knowledge. I may be wrong. You've been
warned. :)
You must can only tunefs a dismounted filesystem - so you must do one of
a few things:
* Boot off a "fixit" floppy that has a statically linked tunefs
on it.
* Boot off another partition.
Personally, I use the second method. In a multi-disk system, I set up a
root filesystem on the second disk as well as the first. I periodically
dump/restore the root filesystem to the "shadow" root. The only
modification required on the shadow root is the location of root in
/etc/fstab.
This way I can still boot the system to perform maintenance even if my
root disk fails. Makes reslicing your root disk easy instead of
requiring a reinstall.
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