From owner-freebsd-fs  Wed May  1 17:10:51 2002
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Date: Wed, 1 May 2002 17:10:38 -0700 (PDT)
From: "Andrew P. Lentvorski" <bsder@allcaps.org>
To: Ian Dowse <iedowse@maths.tcd.ie>
Cc: <utsl@quic.net>, <freebsd-fs@freebsd.org>
Subject: Re: Non-standard root filesystems 
In-Reply-To: <200205012027.aa63727@salmon.maths.tcd.ie>
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On Wed, 1 May 2002, Ian Dowse wrote:

> I presume you know that FreeBSD already allows you to mount another
> filesystem directly over /? Do you actually need to remove the
> original root filesystem, or is it just for cosmetic reasons that
> you would like it to disappear from the mountlist?

I believe that if you open a file on the underlying filesystem, it's
descriptor remains active even if you union mount/overlay mount the fs.
Until you close all the open files, there is still access going to the
underlying fs.

Somebody please correct me if I am mistaken on this.

-a


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