Attached is my grub:
usbtux wrote:Presumeing you have linux on disk 1 (/sda) and another separate linux on disk 2 (/sdb)
You should be able to - At boot chose from /bios/boot manager which disk to boot from
You need to edit your grub to point to which disk/partition to boot from. So if mint is on disk one = /sda - disk one may look like
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 14419967 7208960 83 Linux
/dev/sda2 14422014 31342591 8460289 5 Extended
/dev/sda5 14422016 26843135 6210560 83 Linux
/dev/sda6 26845184 31342591 2248704 82 Linux swap / Solaris
Reinstall grub with following steps
boot and run from Linux Live DVD/CD
from a terminal sudo os-prober, and look for the mint partition this should be the / partition (root)
mount it with sudo mount /dev/sdaX /mnt, replace X with actual root partition of your selection
reinstall grub with sudo grub-install --root-directory=/mnt /dev/sda
Either do the same for disk two or edit the new grub menu to point at the other linux with a new menu item.
Another way would be to boot to mint and then install http://www.webupd8.org/2012/09/grub-customizer-30-released.html%20grub%20customizer
Flemur wrote:"Stand-alone, both drives boot fine if the other drive is not connected."
I have two HDs, one with 3 linuxes and the other with win7, which I hardly ever use. Having both connected while installing OSs and/or grub typically causes weird problems.
My free advice is:
- disconnect one disk and install/update grub on the connected disk as if it's going to be your only disk - it can't be aware of the disk that isn't there.
- do the same process with the 2nd disk (with the first disk now disconnected).
- make sure they both work separately, then connect both.
- use BIOS to select the disk to boot from; you should be able to access the other disk w/o problems (possible sda vs sdb probs?).
By "disconnected" I mean no cables attached.
ddurdle wrote:I have since discovered the hard drives have the same UID, I have yet to test changing the UID on one of the drives (and then re-setting up grub on it now that it has a different UID). I believe once the drives have unique UIDs, I'll be able to boot from either of them while the other is connected without the issue.
sudo tune2fs -U random /dev/sda3
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