RE: difference in recognizing the drives on boot and in running OS ?

[Leslie Rhorer]

> -----Original Message-----
> From: address@hidden [mailto:help-grub-
> address@hidden On Behalf Of Lentes, Bernd
> Sent: Thursday, October 06, 2011 6:20 PM
> To: GRUB ML (address@hidden)
> Subject: difference in recognizing the drives on boot and in running OS ?
> 
> Hi,
> 
> i have a sles 10 box not booting. Grub says error 22, which, afaik means
> that it doesn't find a partition. / and /boot reside on /dev/sdc2.
> Device.map says sdc is hd2 in GRUB notation. I changed the root entries in
> menu.lst to hd2,1. I ran (in a GRUB shell in the running OS) root (hd2,1)
> and setup (hd2). Everything went fine. But when i try to reboot, i get
> error 22. Is there a possible difference between GRUB recognizing the
> drives during boot, and later on in a running OS ?

Probably not, but there is most definitely a possibility the drive target
will change between one boot and the next.

> Is there a way to find
> out how GRUB assigns the drives on boot, maybe using the GRUB command-line
> which is available during boot up ?

No, but running GRUB2 instead of GRUB Legacy and specifying the drive target
by UUID should eliminate the issue.