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Date: Fri, 06 May 2005 10:25:08 +0300
From: Danny Braniss <danny@cs.huji.ac.il>
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cc: stable@freebsd.org
cc: hartzell@alerce.com
Subject: Re: Current status of nullfs and/or unionfs? 
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> Interesting approach. Is this with 4.x or 5.x? How do you union-mount /=
etc
> (mount command/fstab entry)?
> =


been doing it since 4.x (i think x < 9)

in initdiskless (5.x) we have:

if [ -e /conf/union ]; then
    kldload unionfs
    mount_md 4096 /conf/etc
    chmod 755 /conf/etc
    mount_unionfs /conf/etc /etc
    ls -R /etc > /dev/null
    touch /etc/.sentinel
    md_created_etc=3Dcreated
fi

danny