Date: Thu, 06 Oct 2005 16:51:04 +0200 From: Erik Stian Tefre <erik@tefre.com> To: Vivek Khera <vivek@khera.org> Cc: stable@freebsd.org Subject: Re: how to unstick NFS freebsd 4.11 Message-ID: <1128610264.674.149.camel@bavian.netlife.no> In-Reply-To: <590A1D17-F59A-46F3-86CC-59C0C1B8963D@khera.org> References: <590A1D17-F59A-46F3-86CC-59C0C1B8963D@khera.org>
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On Thu, 2005-10-06 at 10:33 -0400, Vivek Khera wrote:
> Running a box I just upgraded on September 30 to 4.11-STABLE.
>
> I have what appears a wedged NFS client. The NFS server was recently
> replaced with a new box after a failure. However, now the client
> can't umount the old one. How can I clear this up without a reboot
> (which is a *painful* thing to do on a production box):
>
> [root@w02]# ls /n/lorax1
> ls: /n/lorax1: Stale NFS file handle
> [root@w02]# df
> Filesystem 1K-blocks Used Avail Capacity Mounted on
> /dev/amrd0s2a 128990 41902 76770 35% /
> /dev/amrd0s2f 201518 38654 146744 21% /u/w02
> /dev/amrd0s2e 604718 396194 160148 71% /usr
> /dev/amrd0s2g 15285872 12972172 1090832 92% /var
> mfs:23 32206 354 29276 1% /tmp
> procfs 4 4 0 100% /proc
> [root@w02]# umount /n/lorax1
> umount: unmount of /n/lorax1 failed: Device busy
> [root@w02]# mount /n/lorax1
> mount: /n/lorax1: Stale NFS file handle
>
> also, fstat shows nothing sitting inside of /n/lorax1 as its working
> directory.
umount -f will probably work.
>From the umount manual:
-f The filesystem is forcibly unmounted. Active special devices
continue to work, but all other files return errors if further
accesses are attempted. The root filesystem cannot be forcibly
unmounted.
--
Erik Stian Tefre
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