[arch-general] Bizarre grub drive number switch from (hd1, 5) to (hd2, 5) but no hd2 defined???

[David C. Rankin]

On 12/12/2010 01:54 AM, David C. Rankin wrote:
> 	I have managed to get myself in a number of messes over the years, but usually
> when I figure out what went wrong, I understand why. Here, I'm at a complete loss.
> 
> 	I was going to preserve my existing kernel through update and I described in an
> earlier email. (I'm still on kernel26-2.6.36.1) So I created a custom initramfs
> and preserved the module tree and added the entries to grub menu.lst. This box
> has always booted arch on (hd1,5) a device mapper array. (hd0) is another device
> mapper array with an old suse install on it. However, after I made may changes
> and went to reboot to test the custom initramfs, I got a grub 13 error for an
> invalid executable??
> 
> 	So I booted with the Arch 2010.05 install disk and chrooted my existing install
> and looked at grub. When I did my grub > find /boot/grub/stage1, grub reported
> stage1 on
> 
> (hd0,4)
> (hd2,4)
> 
> WTF? I don't have an hd2 and what the heck happened to hd1??
> 
> [01:42 archangel:/boot/grub] # cat device.map
> (hd0) /dev/mapper/nvidia_fdaacfde
> (hd1) /dev/mapper/nvidia_baaccaja
> (fd0) /dev/fd0
> 
> 	So I decided to give booting to hd2 a try. So I reconfigured the suse menu.lst
> file to call (hd2,5) to boot Arch, and I redid the Arch menu.lst to point
> everything at (hd2,5) instead of (hd1,5) and rebooted. To my shock and surprise
> - it booted just fine with all the drive number flipped from 1->2.

With great trepidation after the grub root number change, I went ahead and
updated to 2.6.36-2 and all worked fine. Even though I'm still booting to hd2,
it boots just fine. Dunno why or what caused the change... Oh well...

-- 
David C. Rankin, J.D.,P.E.
Rankin Law Firm, PLLC
510 Ochiltree Street
Nacogdoches, Texas 75961
Telephone: (936) 715-9333
Facsimile: (936) 715-9339
www.rankinlawfirm.com