Date: Mon, 19 Nov 2007 11:01:06 -0700 From: James Harrison <jamesh@lanl.gov> To: Laszlo Nagy <gandalf@shopzeus.com> Cc: freebsd-questions@freebsd.org Subject: Re: mount -u -o rw / not working on NFS? Message-ID: <1195495266.6886.17.camel@p25dual1.lanl.gov> In-Reply-To: <4741C8E5.4020201@shopzeus.com> References: <4741C8E5.4020201@shopzeus.com>
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On Mon, 2007-11-19 at 18:33 +0100, Laszlo Nagy wrote: > Hi All, > > I have a system where a diskless FreeBSD 6.3 i386 machine boots with pxeboot from a FreeBSD 6.3 amd64 machine. I have lines in /etc/fstab for the diskless machine like: > > # Device MountPoint FsType Options Dump Pass > 172.16.0.1:/usr /usr nfs rw 0 0 > 172.16.0.1:/mnt/d2/rootfs/root /root nfs rw 0 0 > > The machine boots from network nicely, then I can login as root and invoke these commands: > > mount -u -o rw / > mount -u -o rw /usr > mount -u -o rw /root > > There is no error message on the console, nor in the system log. However, this happens afterwards: > > diskless101#mkdir /aaa > mkdir aaa: Read-only file system > > Question: if the remount did not succeed, why didn't it throw an error? If succeeded, why can't I write on the filesystem? > > Thanks, > > Laszlo > The answer to the second portion is that you're mounted as a read only file system, so there's no write access. There's an nfs permissions file you may need to edit, /etc/exports/, which controls whether NFS shares the file system as read only, read write, whether root can have root on the file system etc. James
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