Hello,

I'm using a Dell Dimension 9100. It has two internal SATA hard disks. I installed FC6 on hd0. Windows XP is on hd1. I edited grub.conf to make the machine dual boot. Here are the grub.conf entries:

---
title Fedora Core (2.6.18-1.2869.fc6)
root (hd0,0)
kernel /vmlinuz-2.6.18-1.2869.fc6 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.18-1.2869.fc6.img

title Fedora Core (2.6.18-1.2868.fc6)
root (hd0,0)
kernel /vmlinuz-2.6.18-1.2868.fc6 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.18-1.2868.fc6.img

title DOS
map (hd1) (hd0)
map (hd0) (hd1)
rootnoverify (hd0,0)
makeactive
chainloader +1
boot

---

Here is the fdisk -l listing:

---

Disk /dev/sda: 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/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 20023 160730325 8e Linux LVM

Disk /dev/sdb: 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/sdb1 * 1 20022 160826683+ 7 HPFS/NTFS

---

When the grub menu appears and I select DOS, I get:

Error 13: Invalid or unsupported executable format

Why won't grub let Windows boot?

(If I switch hard disks and reboot, Windows does boot, so I'm sure that partition is good.)

Thanks,

SR

The map is to allow 'doze to work.
Grub doesn't need to be "fooled".

It worked.

I first got Error 21: device does not exist. I hunted around and found out that the SATA drive needs to be turned on from the BIOS.

THANKS to you and Grub.

Hi!
I've got a similar problem but your suggestion does not make me happy ...
I installed FC 6 on one of my SCSI-disks.
Later on i installed Windows XP on a SATA drive with the SCSI board disabled.
Now I want to dual boot with GRUB!

Disks
Disk /dev/sda: 9105 MB, 9105024000 bytes
255 heads, 63 sectors/track, 1106 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 13 104391 83 Linux
/dev/sda2 14 1106 8779522+ 8e Linux LVM

Disk /dev/sdb: 9105 MB, 9105024000 bytes
255 heads, 63 sectors/track, 1106 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 1 1106 8883913+ 83 Linux

Disk /dev/sdc: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdc1 * 1 38912 312560608+ 7 HPFS/NTFS

Disk /dev/sdd: 320.0 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System

My grub.conf
title Fedora Core (2.6.19-1.2895.fc6)
root (hd0,0)
kernel /vmlinuz-2.6.19-1.2895.fc6 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.19-1.2895.fc6.img
title Fedora Core (2.6.18-1.2869.fc6)
root (hd0,0)
kernel /vmlinuz-2.6.18-1.2869.fc6 ro root=/dev/VolGroup00/LogVol00 rhgb quiet
initrd /initrd-2.6.18-1.2869.fc6.img
title Windows XP Pro
map (hd0) (hd2)
map (hd2) (hd0)
rootnoverify (hd2,0)
chainloader +1

I also get "Error 13: Invalid or unsupported executable format" when trying to boot XP

I had some similar kind of problem

I would suggest if you have Two hard drives try to install both OS on one hard drive, and try to install Windows first and then Linux, and in this way you can keep the second drive for a backup drive for both OS it works fine. well tried my self as same as you keeping one OS for one drive and the second drive for the second OS but was not succeed then planed the above and got it working.

thanks