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Windows 7: Help me get along with GPT/EFI please! :)

18 Feb 2017   #1
unko

Win7x64
 
 
Help me get along with GPT/EFI please! :)

Hey, i got a new laptop which is set to EFI/GPT as stock. I set BIOS to legacy & format to MBR but i wanna learn. My problem is i usually use winsetupfrom usb to make bootable flashdrives containing multiple windows, linux, tools.. I can't find good information about using winsetupfrom with GPT partitions.

I actually don't even know how to make an EFI partition first manually. If i use RUFUS, i can create a bootable windows install flashdrive BUT this is JUST 1 windows. I'd like to go further and split the flashdrive in two partitions, second would be macOS installer.

I did this years ago & it was working good, however this was MBR. With the flashdrive formated by RUFUS, the EFI partition is few KB, which macOS (format utility) reject. I do not understand well how to change EFI partition size, especially here it's listed FAT12?!


My System SpecsSystem Spec
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18 Feb 2017   #2
Megahertz07

Windows 7 HP 64
 
 

You should leave your BIOS as EFI, not legacy.
As Win 7 isn't compatible with Secure boot, you must disable it and enable CSM (Compatible System Mode). And disable fast boot to be able to launch boot menu.

On a Legacy - MBR, BIOS takes to MBR, a disk sector that has the information where is the master boot loader.
If you have more than a OS in the disk, this Master Boot loader can have a option to take the sequence to another boot loader.
On a Legacy - MBR you choose a disk to boot from. Boot loaders are on a serial sequence, one after the other.

On a UEFI - GPT, BIOS takes to a EFI (100M- Fat32) partition where you can have many boot loaders.
On a UEFI - GPT you choose what boot loader to use on the EFI partition.

So if you want to use a USB flash disk with many boot able options, EFI is the best option.
My System SpecsSystem Spec
18 Feb 2017   #3
unko

Win7x64
 
 

Thanks for these explanations but i still do not how to proceed to create my flash drive..
My System SpecsSystem Spec
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24 Feb 2017   #4
unko

Win7x64
 
 

I wish someone could help me here.. :=
My System SpecsSystem Spec
24 Feb 2017   #5
RolandJS

Windows 7 Professional 64-bit
 
 

"...I'd like to go further and split the flashdrive in two partitions, second would be macOS installer..."
MagicISOMaker and SARDU MultiBoot Creator are two utilities that I know of can make multi-boot usb sticks.
I have never done such, and have never used either one of the above; my only claim to 15 seconds of fame is making various Linux boots to use their respective file manager.
My System SpecsSystem Spec
26 Mar 2017   #6
unko

Win7x64
 
 

Thanks but these didn't do. I found out an app called YUMI which helped! Perhaps it'll help someone here too
My System SpecsSystem Spec
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 Help me get along with GPT/EFI please! :)




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