Re: GRUB troubles with Re: Distinguishing SATA disks

[Hugo Vanwoerkom <hvw59601@care2.com>]

Hendrik Boom wrote:
> On Wed, 04 Feb 2009 17:02:18 +0100, Frederik Kriewitz wrote:
>
> > On Wed, Feb 4, 2009 at 3:21 PM, Hendrik Boom <hendrik@topoi.pooq.com>
> > wrote:
> > > Fun. Lost of symlinks.  Can I use these to identify the drives to be
> > > used in RAID pairs or for LLVM?
> > Yes
>
> Well, that worked.  And /etc/fstab is happy with
>
> /dev/disk/by-id/ata-ST3750640AS-5QD4Z81L-part1 /bottom ext3 defaults,auto,rw,nodev 0 0
>
> but /boot/menu/grub is not happy with
>
> title           Debian GNU/Linux, kernel 2.6.18-6-amd64 (new)
> root            /dev/disk/by-id/ata-ST3750640AS-5QD4Z81L-part1
> kernel          /boot/vmlinuz-2.6.18-6-amd64 root=/dev/disk/by-id/ata-ST3750640AS-5QD4Z81L-part1 ro 
> initrd          /boot/initrd.img-2.6.18-6-amd64
>
> Evidently, grub wants a different notation.  The manual grup manual
> provides hd and fd notation, but the drives are sd, and, again, how would
> grub know which is which? 

Grub2 or Grub legacy?

I have that trouble with USB disks, because Legacy wants

root (x,y)

hardcoded, none of that "by-id" stuff.

So I switched to http://stmaarten.globat.com/~supergrubdisk.org/index.php

"super grub disk" that allows me to state in menu.lst:

title           2.6.26-1-686 di install
findf           /wd80_0jd-60.03
root            $(out_device)
kernel          /boot/vmlinuz-2.6.26-1-686 root=LABEL=wd80_0jd-60.03 
noapic apm=on vga=791 edd=off ddcon-1 network quiet
initrd          /boot/initrd.img-2.6.26-1-686
boot

Key is that "findf", that looks for a file on any disk named 
"/wd80_0jd-60.03" and uses *that* disk as root.
So in your case you would stick a file named 
/ata-ST3750640AS-5QD4Z81L-part1 on the disk labeled by that and SGD 
would stick the appropriate (x,y) in "out_device" and away you'd go.

Give that a try.

Hugo