grub sees 2 out of 3 systems...lucky me

[Lucio M Nicolosi]

On 04/18/2010 09:55 PM, Robert Holtzman wrote:
> I was running Hardy, Jaunty, and Debian Lenny on the desktop box. 
> Decided to go from Jaunty to Karmic via the upgrade route. First thing I 
> noticed was Karmic's grub didn't see Hardy. Oh, bother (paraphrased) 
> said I and reinstalled Jaunty with a clean install. Now Jaunty's grub 
> didn't see Hardy. Since Hardy was my workhorse I reinstalled it via a 
> clean install. Now Hardy can't see Jaunty. All three Ubuntus saw Debian. 
> With the Jaunty and Karmic installs I tried copying the grub stanzas for 
> Hardy to the respective menu.lst files but got "files not found" (approx 
> wording) when I tried booting Hardy. With Hardy I copied the Jaunty 
> stanzas and got the same result when I tried to boot Jaunty.
> 
> I *think* the problem may have to do with not having the right UUIDs for 
> what I copied into the menu.lst files. Do UUids change on multiple 
> installs of the same version?
> 
> Anyone know a way out of this?
> 

Perhaps you installed Grub2 on Karmic and formatted the new partition w/
ext4.

If this is the case I recommend checking Grub2 docs, because it has
nothing to do with Grub1.

If I remember correctly, Grub1 (legacy) has issues with ext4 and at
least for me, Grub2 refuses to (automatically) recognize other Ubuntu
partitions.

Since you (brave heart) reinstalled Jaunty and Hardy, you have now Grub1
and although it might not recognize Karmic, some fiddling with
/boot/grub/menu.lst might restore your boot screen, at least your
releases up to Jaunty.

I guess UUIDs are set when a partition is created and do not change
afterwards. Anyway you can always check the boot parameters of each
release by mounting its root partition.

Of course, commands:

ls -l /dev/disk/by-uuid/

df

or even GParted

can help you check what is what in your disks.

L.


-- 
L M Nicolosi, Eng.
Lat.: 23°34'4.79"S - Long.: 46°39'59.53"W
Linux Regist. User #481505 - http://counter.li.org/

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