GRUB on slave HDD

[webdoctors]

I seem to have a SATA drive as my primary, and a IDE drive as secondary.
I have Vista installed on the SATA and LinuxMint and XP installed on the IDE secondary drive.

I can boot Vista and XP, but there's no GRUB showing up to boot up the Linux OS.

Using the live-CD to mount the ext3 partition and install grub doesnt work, grub can't seem to find the /boot/grub/menu file although I can go to that directory and read the file.

Does GRUB have to be installed on the primary HDD's MBR?

[Husse]

Welcome to Mint webdoctors

Does GRUB have to be installed on the primary HDD's MBR?

No, but it's always (?) easier and if you don't, you have to have something to get you to the second disk. It can be the boot order in BIOS or something on the first disk that refers to grub on the second.
You can use the wiki to repair grub and place it on the mbr of the first disk.
http://www.linuxmint.com/wiki/index.php ... _your_grub
If you do that you won't be able to boot Vista as I think it's not in your menu.lst (Note its menu.lst not menu ) But it can be added, there is an example of how you do it in the comments - just use Vista instead of win95 in the title

[Lolo Uila]

Basically, the computer will boot the 1st active primary partition it finds. If your 1st drive does not have an active partition, then the 2nd will boot. If both drives have active partitions, then the 1st drive will have boot priority. Boot priority can be changed a few ways (depending on the OS, BIOS, etc.).

How are you dual-booting Vista & XP now?