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Date: Fri, 24 Mar 2006 13:40:44 -0500
From: Kris Kennaway <kris@obsecurity.org>
To: Viren Patel <virenp@mail.utexas.edu>
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Cc: questions@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject: Re: FreeBSD 6.1 - mount_nullfs broken?
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On Fri, Mar 24, 2006 at 12:39:30PM -0600, Viren Patel wrote:
> > On Fri, Mar 24, 2006 at 08:05:31AM -0600, Viren Patel
> > wrote:
> >
> >> # umount /export/jails/testjail/dev
> >> # mount_nullfs -o ro /export/jails/basejail
> >> /export/jails/testjail/basejail
> >> mount_nullfs: Operation not supported by device
> >>
> >> After looking at the dmesg output more closely one
> >> discrepancy I found was the second last line:
> >>
> >> ad6: 238475MB <WDC WD2500JS-55MHB0 02.01C03> at
> >> ata3-master SATA300
> >>
> >> It was definitely SATA150 under FreeBSD 6.0, even after
> >> updates. So maybe a problem in the SATA300 driver?
> >
> > Unlikely.  It looks like you don't have kernel nullfs
> > support enabled.
> >
> > Kris
> >
>=20
> I am using the generic kernel. Looking through /etc there
> is nothing regarding enabling nullfs. I also looked at
> GENERIC kernel conf file without luck. How do I enable
> nullfs?

Compile it into your kernel or load the module.  Read the handbook for
more help.

Kris

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