Boot from SCSI, chainload to IDE?

[Jago Pearce]

First of all, I'm really sorry about this because it stinks of an FAQ.

However, the WIKI is down and it seems to be unusual enough to not be
in the man page.

I have grub on my SCSI drive, which is always in the computer. From
time to time I put an IDE drive in the computer so I need to chainload
to that drive. At the moment I'm having the use the BIOs to boot the
Windows OS on this new IDE drive.

I have tried all combinations of (hdx,x) and I can't get it to
chainload to that IDE drive (which does indeed have a boot sector
because I can boot it by avoiding grub and using the BIOs every time).

At the moment grub is set to boot hd0,0 which is the SCSI drive.
Therefore the next drive MBR should be (hd1,0) but that does work if I
chainload to that.

Bios options:

- Set to boot from SCSI only
---

address@hidden:~ # fdisk -l

Disk /dev/sda: 18.3 GB, 18351959040 bytes
255 heads, 63 sectors/track, 2231 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1        2136    17157388+  83  Linux
/dev/sda2            2137        2231      763087+   5  Extended
/dev/sda5            2137        2231      763056   82  Linux swap / Solaris

Disk /dev/hdb: 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/hdb1               1          37      297171   82  Linux swap / Solaris
/dev/hdb2              38        9729    77850990   83  Linux
address@hidden:~ #

--

# menu.lst - See: grub(8), info grub, update-grub(8)
#            grub-install(8), grub-floppy(8),
#            grub-md5-crypt, /usr/share/doc/grub
#            and /usr/share/doc/grub-doc/.

## default num
# Set the default entry to the entry number NUM. Numbering starts from 0, and
# the entry number 0 is the default if the command is not used.
#
# You can specify 'saved' instead of a number. In this case, the default entry
# is the entry saved with the command 'savedefault'.           
default  0

## timeout sec
# Set a timeout, in SEC seconds, before automatically booting the default entry
# (normally the first entry defined).
timeout  3

## hiddenmenu
# Hides the menu by default (press ESC to see the menu)
hiddenmenu

# Pretty colours
#color cyan/blue white/blue

## password ['--md5'] passwd
# If used in the first section of a menu file, disable all interactive editing
# control (menu entry editor and command-line)  and entries protected by the
# command 'lock'
# e.g. password topsecret
#      password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/
# password topsecret

#
# examples
#
# title  Windows 95/98/NT/2000
# root  (hd0,0)
# makeactive
# chainloader +1
#
# title  Linux
# root  (hd0,1)
# kernel /vmlinuz root=/dev/hda2 ro
#

#
# Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST

### BEGIN AUTOMAGIC KERNELS LIST
## lines between the AUTOMAGIC KERNELS LIST markers will be modified
## by the debian update-grub script except for the default optons below

## DO NOT UNCOMMENT THEM, Just edit them to your needs

## ## Start Default Options ##
## default kernel options
## default kernel options for automagic boot options
## If you want special options for specifiv kernels use kopt_x_y_z
## where x.y.z is kernel version. Minor versions can be omitted.
## e.g. kopt=root=/dev/hda1 ro
# kopt=root=/dev/sda1 ro

## default grub root device
## e.g. groot=(hd0,0)
# groot=(hd0,0)

## should update-grub create alternative automagic boot options
## e.g. alternative=true
##      alternative=false
# alternative=true

## should update-grub lock alternative automagic boot options
## e.g. lockalternative=true
##      lockalternative=false
# lockalternative=false

## altoption boot targets option
## multiple altoptions lines are allowed
## e.g. altoptions=(extra menu suffix) extra boot options
##      altoptions=(recovery mode) single
# altoptions=(recovery mode) single

## nonaltoption boot targets option
## This option controls options to pass to only the
## primary kernel menu item.
## You can have ONLY one nonaltoptions line
# nonaltoptions=quiet splash

## controls how many kernels should be put into the menu.lst
## only counts the first occurence of a kernel, not the
## alternative kernel options
## e.g. howmany=all
##      howmany=7
# howmany=all

## should update-grub create memtest86 boot option
## e.g. memtest86=true
##      memtest86=false
# memtest86=true

## ## End Default Options ##

title  Ubuntu, kernel 2.6.10-5-k7 
root  (hd0,0)
kernel  /boot/vmlinuz-2.6.10-5-k7 root=/dev/sda1 ro quiet splash
initrd  /boot/initrd.img-2.6.10-5-k7
savedefault
boot

title  Ubuntu, kernel 2.6.10-5-k7 (recovery mode)
root  (hd0,0)
kernel  /boot/vmlinuz-2.6.10-5-k7 root=/dev/sda1 ro single
initrd  /boot/initrd.img-2.6.10-5-k7
savedefault
boot

title  Ubuntu, kernel 2.6.10-5-386 
root  (hd0,0)
kernel  /boot/vmlinuz-2.6.10-5-386 root=/dev/sda1 ro quiet splash
initrd  /boot/initrd.img-2.6.10-5-386
savedefault
boot

title  Ubuntu, kernel 2.6.10-5-386 (recovery mode)
root  (hd0,0)
kernel  /boot/vmlinuz-2.6.10-5-386 root=/dev/sda1 ro single
initrd  /boot/initrd.img-2.6.10-5-386
savedefault
boot

title  Ubuntu, kernel memtest86+ 
root  (hd0,0)
kernel  /boot/memtest86+.bin  
savedefault
boot

### END DEBIAN AUTOMAGIC KERNELS LIST