Mike,

I'd try a bootdisk, Tom's comes to mind, http://www.toms.net/rb/
then use fdisk or parted to unhide the partition.  Unless grub has changed
its config from version I'm using, I think the file you want is
/boot/grub/menu.lst, not /boot/grub/grub.conf.

Alternatively, grub has a nice command editor built in, you might try a
bootdisk with grub on it and use the editor to unhide the partition.

Didn't see grub or parted listed on Tom's tho :-(

Bob

mcnixon at mchsi.com wrote:
> I was fooling around with my grub.conf file and I 
> thought I'd try "hide(hd0,3)" which is of course my 
> extended partition, which includes /boot (in the 8th 
> partition) and /boot/grub/grub.conf
> So when I rebooted I got a Grub Error 22 (No such 
> partition) in stage 2.
> Is there some way for me to get into the grub shell and 
> easily undo this (with a unhide(hd0,3) command perhaps)?
> 
> Anything else I might try to recover my extended 
> partition? 
> (I have the important stuff backed up if I need to start 
> from scratch).
> 
> Thanks,
> Mike Nixon