grub - wierd problem !
- From: "dave selby" <dave6502@xxxxxxxxxxxxxx>
- Date: Sat, 26 May 2007 23:38:10 +0100
I have fiesty fawn installed on an external HDD which I use as a
'mobile machine' to do development on.
I plug it into my work XP laptop, re-boot, hello dev system, I plug it
into my wifes machine, reboot, hello dev system ...
I plug it into my desktop machine (also an ubuntu machine - edgy this
time) - reboot and grub error 21 selected disk does not exist. I have
been hacking at this for a couple of days and in a nutshell this is
what I do not understand ...
I boot my machine into edgy. I enter grub and check what grub sees
using find ...
grub>
grub> find /boot/grub/menu.lst
(hd0,0)
(hd1,0)
(hd2,0)
grub>
OK so far, hd0 & hd1 are a software raid array and hd2 is my external
USB HDD (incidentally the system does not see hd3 unless sudo grub ?)
So I amend my edgy menu.lst and add an entry to boot my external USB HDD
title Dev System ext USB HDD
root (hd2,0)
kernel /boot/vmlinuz-2.6.20-15-generic
root=UUID=020f96ed-4b49-4287-b3a6-309a782abbb4 ro quiet splash
initrd /boot/initrd.img-2.6.20-15-generic
quiet
savedefault
reboot and I get error 21, selected disk does not exist. I use find to
see what grub sees & I get
grub> find /boot/grub/menu.lst
(hd0,0)
(hd1,0)
grub>
ie my external HDD has disappeared ! so I booted back into edgy & ...
dave@dave-comp:/boot/grub$ sudo fdisk -l
Password:
Disk /dev/hda: 164.6 GB, 164696555520 bytes
255 heads, 63 sectors/track, 20023 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 19087 153316296 fd Linux RAID autodetect
/dev/hda2 19088 20023 7518420 5 Extended
/dev/hda5 19088 20023 7518388+ fd Linux RAID autodetect
Disk /dev/hdc: 164.6 GB, 164696555520 bytes
255 heads, 63 sectors/track, 20023 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hdc1 * 1 19087 153316296 fd Linux RAID autodetect
/dev/hdc2 19088 20023 7518420 5 Extended
/dev/hdc5 19088 20023 7518388+ fd Linux RAID autodetect
Disk /dev/md0: 156.9 GB, 156995813376 bytes
2 heads, 4 sectors/track, 38329056 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md0 doesn't contain a valid partition table
Disk /dev/md1: 7698 MB, 7698710528 bytes
2 heads, 4 sectors/track, 1879568 cylinders
Units = cylinders of 8 * 512 = 4096 bytes
Disk /dev/md1 doesn't contain a valid partition table
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/sda1 1 9240 74220268+ 83 Linux
/dev/sda2 9241 9483 1951897+ 82 Linux swap / Solaris
/dev/sda3 9484 9729 1975995 b W95 FAT32
dave@dave-comp:/boot/grub$
and .........
grub> find /boot/grub/menu.lst
(hd0,0)
(hd1,0)
(hd2,0)
grub>
ie my external HDD is back again.
Any ideas anyone - I have been hacking at this for two days straight.
Cheers
Dave
PS my /boot/grub/devices.map used to be
dave@dave-comp:/boot/grub$ cat /boot/grub/device.map
(hd0) /dev/hda
(hd1) /dev/hdc
dave@dave-comp:/boot/grub$
So I modified it to read ...
dave@dave-comp:/boot/grub$ cat /boot/grub/device.map
(hd0) /dev/hda
(hd1) /dev/hdc
(hd2) /dev/sda
dave@dave-comp:/boot/grub$
--
The unavoidable price of reliability is simplicity.
-- C.A.R. Hoare
--
ubuntu-users mailing list
ubuntu-users@xxxxxxxxxxxxxxxx
Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-users
- Prev by Date: RSS Reader
- Next by Date: Re: RSS Reader
- Previous by thread: RSS Reader
- Next by thread: Strange Video Driver Pixelation Problem
- Index(es):
Relevant Pages
|
