Triple Boot, need GRUB2 help pls.

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2013, October 26 - 2:41am

themacmeister

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Joined: 2009 Oct 26

Triple Boot, need GRUB2 help pls.

My Mac Pro 4,1 currently has THREE operating systems installed.

Mac OS X 10.8.5 (supplemental) - 1st disk, 1st partition, 1st installed
Windows 7 64bit - 1st disk, 2nd partition, installed 2nd with Boot Camp Assistant
Xubuntu 13.04 64bit - installed last to a separate 1TB HDD

Using Boot Camp (Startup Disk), it boots to GRUB2, and not windows, but I can boot Windows from GRUB2.

OSX does not load from GRUB2 (gets to the point where it says "Still waiting for root device")

I can switch readily between Windows/OSX using BootCHAMP or BootCamp windows taskbar item.

At the moment, using different techniques, I can boot into all OSes, but I would prefer to have a unified working bootloader and not have to go through other OS to get where I want. GRUB2 was working before, but failed on my second Linux install, as I accidentally replaced MBR, and didn't use the / partition.

PLEASE NOTE: I have a non-EFI firmware graphics card, so cannot see any early boot screens (Boot Camp, rEFIt, etc.). The text-only GRUB menu DOES WORK tho.

If anyone can help out, I would really appreciate it.

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2013, October 26 - 10:32am

MikeTomTom

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Joined: 2009 Dec 7

I'd like to help you out, tmm, but having not been there as yet...

Spotted a couple of recent threads (with solutions) which may be of use, I hope:
Can't boot into OS X after installing Linux & GRUB2
Restoring "Macintosh HD" GUID

2013, October 27 - 11:09am

themacmeister

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Joined: 2009 Oct 26

Thanks for those MTT.

I have no issue with OSX whatsoever, but I accidentally replaced the MBR instead of installing GRUB to the root PARTITION (grrrr - silly me).

UPDATE: Neither of those links help in my situation. I may have to remove Linux completely and start again (after repairing the Win7 bootloader).

2013, October 27 - 12:10pm

(Reply to #3) #4

MikeTomTom

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Joined: 2009 Dec 7

Ah, I thought you were having probs with the OSX part. I've used MBRFix with success in the past to get rid of grub probs. To restore MBR that is.

2013, October 28 - 2:11am

themacmeister

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Joined: 2009 Oct 26

Yeah, I will be using the Win7 alternative, which name I cannot remember offhand, but I have the original disc, and I can look up the info online again. Many thanks, I will dump Linux (temporarily) to get this machine working again (and gain a terabyte of storage).