grub: disk error 25 from menu, but OK from grub shell

[Neil Bird]

   I've created a CD with grub on, & I get the menu OK, but trying to 
actually boot gives me 'error 25: disk read error'.  Hitting 'c' for the 
command line and typing the commands in the grub.conf verbatim (below: 
root, kernel & initrd) followed by 'boot' works though.

   Chaining to the hard-drive copy of the config file ('configfile 
(hd0,4)/grub/grub.conf') gets the menu OK again, but has exactly the 
problems.

   Why might there be a difference?


default 0
prompt 1
splashimage (hd0,4)/grub/splash.xpm.gz
timeout 4

title Linux
   root (hd0,4)
   kernel /vmlinuz root=/dev/VolGroup00/LogVol00
   initrd /initrd.img

-- 
[neil at fnx ~]# rm -f .signature
[neil at fnx ~]# ls -l .signature
ls: .signature: No such file or directory
[neil at fnx ~]# exit