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[bug #46763] allow multibooting of windows-xp 32bit or lower on >2TB dis

From: Andrei Borzenkov
Subject: [bug #46763] allow multibooting of windows-xp 32bit or lower on >2TB discs
Date: Mon, 28 Dec 2015 07:50:16 +0000
User-agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Firefox/38.0

Follow-up Comment #3, bug #46763 (project grub):

> it ends at 1565550314 since this is 1023/63/254 in C/H/S

Your BIOS supports 3TB disk but does not support Extended Read (LBA based)?
May wonders never cease ...

> windows-xp refuses to work if the first partition is a protected one for

Does it work if you put protective partition as the last one?

Anyway, I do not see any need for patches.

Ensure that both MSDOS and GPT labels have the same partition number for GRUB
prefix and use prefix that does not include partition type, like


This will be found using both labels.

And you need not even modify grub-install for that, you can configure your
Linux to install GRBU on partition (or do not install bootsector at all) and
create tiny image that multiboots GRUB directly from

If you have any questions how to implement it, please use address@hidden


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