Date: Fri, 20 Nov 2009 12:49:16 -0500 From: "Michael W. Lucas" <mwlucas@blackhelicopters.org> To: Mel Flynn <mel.flynn+fbsd.questions@mailing.thruhere.net> Cc: questions@freebsd.org Subject: Re: diskless problem: Lookup of /dev for devfs, error: 13 Message-ID: <20091120174916.GA92713@bewilderbeast.blackhelicopters.org> In-Reply-To: <ffe9807eee167dd33f60b24167cd7653@sbmail.office-on-the.net> References: <20091119211829.GA86841@bewilderbeast.blackhelicopters.org> <ffe9807eee167dd33f60b24167cd7653@sbmail.office-on-the.net>
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On Fri, Nov 20, 2009 at 02:20:54AM -0900, Mel Flynn wrote: > On Thu, 19 Nov 2009 16:18:29 -0500, "Michael W. Lucas" > <mwlucas@blackhelicopters.org> wrote: > > Hi, > > > > I'm attempting to run a diskless 8.0 i386 workstation on VMWare, using > > an OpenSolaris box as a file store. I get PXE, the kernel loads, but > > when we try to remount the filesystem I get: > > > > ... > > NFS ROOT: XXX.XXX.XXX.XXX:/storage1/vm/netflow > > Lookup of /dev for devfs, error 13 > > exec /sbin/init: error 13 > > exec /sbin/oinit: error 13 > > exec /sbin/init.bak: error 13 > > exec /rescue/inet: error 13 > > exec /stand/sysinstall: error 13 > > init: not found in path > > ... > > > > At first glance, it would appear that /dev is missing. > > Actually, at first glance it would appear that the mount doesn't allow > execution. Interesting. (BTW, this is running on a GENERIC kernel, no firewall.) I did a packet capture on the OpenSolaris NFS server, and found that the kernel load and initial boot takes place over NFSv2. When the FreeBSD box tries to remount root, it sends a NFSv3 FSINFO request. The server returns NFS3ERR_STALE. It appears that that error is generated when the permissions to the mount are revoked... but we just mounted it seconds before? It turns out that there's a whole discussion thread on nfsv2 and v3 interoperability with diskless systems. See http://lists.freebsd.org/pipermail/freebsd-hackers/2008-January/022792.html for a sample message. Short answer: it seems that there are interoperability annoyances with diskless systems and assorted NFS servers. NFS mount options in /etc/fstab seem to be ignored, but you can set them in /boot/loader.conf. boot.nfsroot.options="nfsv2" made FreeBSD try a NFSv2 remout, and the system came up. Thanks for pointing out it seems to be a permissions error, I wouldn't have headed down this route without that. ==ml -- Michael W. Lucas mwlucas@BlackHelicopters.org http://www.MichaelWLucas.com/ Latest book: Cisco Routers for the Desperate, 2nd Edition http://www.CiscoRoutersForTheDesperate.com/
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