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Top Forums UNIX for Advanced & Expert Users /etc/mnttab is zero length - I have done a silly thing Post 302149104 by Smiling Dragon on Tuesday 4th of December 2007 10:42:02 PM
Old 12-04-2007
Error /etc/mnttab is zero length - I have done a silly thing

Being the clever-clogs that I am, I have managed to clobber the contents of /etc/mnttab.

It started when I tried to unmount all the volumes in a prticular veritas disk group and neglected to include a suitable grep in my command line, thus attempting to unmount _all_ the filesystems on the server (for loop).

They all came back with a fs busy message so I was presuming no harm done. However, a df to check all was in order came back with no results, likewise running mount.

When I went to look in the mnttab itself I find it's zero length !?! Smilie

Everything appears ok in that the filesystems are still actually mounted and read/write.

If I try a mount or umount I get the message
"mount: Inappropriate ioctl for device"

I suspect a reboot would sort me out but that's a big hammer and I'd rather get to the bottom of it.

What have I done and how in the world do I fix it?

Running solaris 10 on a T2000, fairly recent patches applied. Bugger all running aside from base OS and SAN kit.
 

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COPYFS-MOUNT(1) 						   User Commands						   COPYFS-MOUNT(1)

NAME
copyfs-mount - mounts a versioned file system SYNOPSIS
copyfs-mount version-directory mount-point DESCRIPTION
This script lets you mount a CopyFS file system. version-directory is the directory where the files and version information will be stored by CopyFS. When using CopyFS for the first time, copyfs-mount will create the required files in the version-directory before running copyfs-daemon. mount-point is the directory where the copyfs file system will be mounted. This is where the users will have access to the files. If you want to mount a CopyFS at '/mnt/fs', whose version directory is at /var/versions, you would use: root@host# copyfs-mount /var/versions /mnt/fs To unmount it, simply do: root@host# umount /mnt/fs As you would do for any other filesystem. You can also allow an ordinary non-root users to mount and unmount CopyFS filesystems provided that the user is added to the 'fuse' group. Ordinary users will be able unmount the filesystem, using the fusermount command: $ fusermount -u mount-point AUTHORS
CopyFS was created by Thomas Joubert and Nicolas Vigier <boklm@mars-attacks.org> LINKS
<http://n0x.org/copyfs/> CopyFS web site. <http://fuse.sourceforge.net/> FUSE - Filesystem in USErspace SEE ALSO
copyfs(1), copyfs-fversion(1), copyfs-daemon(1), fusermount(1) copyfs-mount May 2008 COPYFS-MOUNT(1)
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