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From: "Bjoern Koenig" <bkoenig@cs.tu-berlin.de>
To: <freebsd-stable@freebsd.org>
Date: Tue, 22 Jun 2004 15:09:18 +0200
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Subject: Re: nullfs in 4.10
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Hello,

first of all:

THIS FILESYSTEM TYPE IS NOT YET FULLY SUPPORTED
(READ: IT DOESN'T WORK) AND USING IT MAY, IN FACT,
DESTROY DATA ON YOUR SYSTEM. USE AT YOUR OWN RISK.
BEWARE OF DOG. SLIPPERY WHEN WET.

My experience:

I had much less problems with unionfs -b, even with FreeBSD 4.10, to mount
for example /usr/ports into a jail temporarily. But for everything else you
should never use it.

Bjoern