booting windows 7 from a gpt disk using bios (non-uefi) _ windows os hub

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In this example, there is one 40 GB disk with 0 index (Disk 0) in the system. As you can see, this

disk has a standard MBR partition table (GPT column is empty)

Convert the partition table of Disk 0 from MBR into GPT using the command

gptgen.exe w\\.\\physicaldrive0

. While running the command, there appears a warning that the developers do not guarantee that

you are able to boot from this partition when the conversion to GPT is over.

4.

Note.0 at the end of the physicaldrive shows that disk 0 should be converted.

gptgen.exe: Partition table converter v1.1

Boot: 1, Type: 07, Start: sector 2048, Length: 204860 sectors

Boot: 0, Type: 07, Start: sector 206858, Length: 83685636 sectors

WARNING: Boot partition(s) found. This tool cannot guarantee that

such partitions will remain bootable after conversion.

Do you want to continue? [Y/N] y

Writing primary GPT and protective MBR to LBA address 0

Writing secondary GPT to LBA address 83786657

Success!

Thus, the conversion of partition table into GPT has been successful!

Transfer of Windows Boot Manager to the USB Flash Drive

Restart the computer and make sure that the system doesnt boot from the hard disk. Excellent! Connect

a USB flash drive or an SD card. Boot from the installation CD/USB disk with Windows (Windows 7 in our

case), and press Shift+F10on the Windows installation screen for opening the console:

Run the command:

diskpart

Display the list of the disks in the system:

listdisk

. Now there are two disks in the system: Disk 0 is a 40 GB hard disk with the OS installed (* the

column gpt shows that this disk contains this type of partition table) and Disk 1 is a 1 GB USB flash

drive.


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Lets dwell on the disks and their letters. Select a hard disk:

selectdisk0

and display the list of volumes on it:

listvolume

According to the size of volumes, you can see that the system is installed on the Volume 2, which has

letter D assigned (it can differ from the letter of the system disk, displayed by Windows itself)

Create the necessary partitions on the USB flash drive:

selectdisk1

select a USB flash drive

clean

clear disk contents

createpartitionprimarysize=1000

create a main partition on the USB flash drive, 1 GB in our case

format

format it

selectpartition1

select the first partition on the USB flash drive

active

mark it as active

listvolume

display the list of volumes again. In this example, you can see that the volume that we have created

is No. 3

selectvolume3

select it

assignletter=G


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booting windows 7 from a gpt disk using bios (non-uefi) _ windows os hub

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