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<H1>[Mageia-discuss] UEFI and Secure Boot</H1>
<B>Goh Lip</B>
<A HREF="mailto:mageia-discuss%40mageia.org?Subject=Re%3A%20%5BMageia-discuss%5D%20UEFI%20and%20Secure%20Boot&In-Reply-To=%3C5033BCDB.9010108%40gmx.com%3E"
TITLE="[Mageia-discuss] UEFI and Secure Boot">lipg at gmx.com
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<I>Tue Aug 21 18:52:43 CEST 2012</I>
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<PRE>On 08/21/2012 11:41 PM, Maurice Batey wrote:
><i> On Tue, 21 Aug 2012 22:48:51 +0800, Goh Lip wrote:
</I>><i>
</I>>><i> be careful installing on UEFI.
</I>><i>
</I>><i> UEFI is Disabled at the moment, and as I have no intention of
</I>><i> Enabling it presumably none of the problems you point to applies.
</I>><i>
</I>><i> An interesting pre-Mageia install question is: If I were to Enable UEFI,
</I>><i> who/what will re-organise the current Windows 7 installation as you
</I>><i> describe to suit, and when?!
</I>><i>
</I>
Maurice,
[1] GPT partitioning -
Most likely, your disk is GPT partitioned and windows 7 installed on it
with at least 2 partitions (one for boot and probably one more for
recovery besides the usual OS partition). As mentioned earlier, Windows
7 (and Linux) will work on BIOS and GPT partitioning. As for enabling
UEFI, windows 7 will work without 'redoing' the partitioning (if it is
already GPT) but you may have to redo the boot (boot.ini? - but I really
don't know for windows). You can try it out by enabling UEFI and check
if it boots Windows 7 without any changes.
You can check if your disk is GPT partitioned by booting a livecd and at
terminal (root), "fdisk -lu" If it is GPT, it will give an error message
(nothing to worry about, fdisk won't work on GPT, that's all).
[2] Grub-legacy
First a disclaimer - I have not used grub-legacy for about 5 years, all
my OS's boots/grubs are 'set' or 'installed' (wrong term, but that's
what it's being used) to their own partitions, including Mageia's
grub-legacy boot. And while I've used/tested GPT partitioning using
BIOS, it is with grub2, not with grub-legacy, I am unsure if Mageia's
grub-legacy could work with GPT and here's a link to help somewhat..
<A HREF="http://www.rodsbooks.com/gdisk/bios.html">http://www.rodsbooks.com/gdisk/bios.html</A>
<A HREF="http://www.rodsbooks.com/gdisk/booting.html">http://www.rodsbooks.com/gdisk/booting.html</A>
So please approach this with caution even though I am sure grub2 will
definitely work with BIOS/GPT and will install alongside Windows 7's
GPT/BIOS.
[3] Installation
I 'refound' this link that helped me (I don't have Sabayon) the most in
this aspect.
<A HREF="http://wiki.sabayon.org/index.php?title=HOWTO:_Install_Sabayon_with_GRUB2_and_GPT_on_a_New_System">http://wiki.sabayon.org/index.php?title=HOWTO:_Install_Sabayon_with_GRUB2_and_GPT_on_a_New_System</A>
Watch out about 'labeling' and 'flagging' the partitions, and if you
need to 'reset' the whole drive as GPT, also 'Create Partition Table'
first. Oh, you'll need a separate 'boot' partition too.
Good luck - Goh Lip
ps: Note that I finally went back to msdos partitioning on my BIOS
system as I found mixing GPT and MSDos drives (I have lots of external
OS's, some iso boots) is incompatible and the main advantage for GPT on
BIOS is for large (>2GB) drives; (though UEFI has way lots more benefits
than BIOS itself).
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