GUID Partition Table (GPT) is a format for partition tables that was designed within the UEFI specification by Intel. It was designed as the successor to the Master Boot Record partition tables.

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MBR to GPT migration on Windows 7 x64 — what is the path forward

I use Backup Exec System Recovery to migrate to larger hard drives, to new PCs, etc. I have painted myself into a new corner, and am looking for the way out. Situation: I migrated to a new hard ...
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17 views

diskpart.exe on Windows 7 with GPT disk — unable to set partition active?

On windows 7. I cannot figure out how to set a volume active or boot on a GPT disk with diskpart. Is that the wrong tool? I am having to go back to MBR, because I just can't figure out how to ...
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2answers
25 views

Remove partitions that appear after GPT format

I recently formatted my USB to EFI with GPT partition on Windows 10 using diskpart. Since then, even though the USB is not plugged in there are two partitions (empty and useless) that show up among ...
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17 views

Install Windows 7 on GPT partition

Today I got really frustrated when tried to upgrade a friend's Lenovo laptop from Win8 to Win10. The upgrade just fails no matter what I try... And I tried a lot of things... Long story short, I ...
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18 views

BIOS with 'no issue UEFICompliant' support for GPT partition tables

I would like to change my hard drive partition table from MBR to GPT, (since MBR supports 4 primary partitions). After some searching, I discovered C:\Windows\Panther\setupacl.log, and found a few ...
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2answers
47 views

Installing Win7x64 on existing Win8 laptop for dual-boot - UEFI/GPT Issue

I have a UEFI HP G7 Laptop with Windows 8.1 pre-installed, and I'd like to add Windows 7 as a dual-boot. In Win8, I've turned off Fast Startup, made room on the existing partition in order to create ...
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1answer
59 views

GPT Partitioned Disk not Recognized by BIOS

I have received a Samsung Ativ Book 4 (model no. NP4705E-K01UB [this computer is UEFI compatible BTW]), and for the first few months that I used it, it has worked fine with MBR partitioned disks. ...
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44 views

Writing .img to USB using dd results in corrupt primary GPT header

I have a 64GB USB 3.0 drive that I plan on installing bootable operating systems to for sysadmin purposes. My primary operating system is Mac OS X 10.11. I have a copy of ...
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28 views

Why did copying my Windows 10 partition to a new location cause my desktop to flash constantly?

Would simply moving my windows partition to an earlier location on the disk, and running bcdedit to create a new boot entry, be expected to cause any problems? Here's what happened: I had a windows ...
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25 views

OS X stopped recognizing my HFS+ partition when I created a new partition before it

I have a 2 TB USB drive that's using GPT, but OSX (10.11.4) on my macbook pro (early 2015) stopped recognizing my HFS+ partition after I inserted a partition before it on the disk. This is what I had ...
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26 views

Did I lose my data by converting HDD from GPT to MBR? [duplicate]

I tried to install Windows, which required an MBR disk instead of a GPT. I converted GPT to MBR using diskpart utility. After that all my logical disks disappeared and only one (with total amount of ...
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26 views

UEFI boot and data disk

I'm on Windows 10 and I'm ready to convert to UEFI boot, but I want to know, if I need to have all my disks with GPT or only disk from which I will boot. Because my data disk is really full and ...
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1answer
31 views

Old redundant Windows 10 boot manager entries after clean installation

I wiped my drive (/dev/sda) which contained previous Windows 10 installation by using gdisk in Arch (which is installed on /dev/sdb) and choosing z for zap (wiping GPT) and deleting whole partitions ...
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1answer
64 views

Do I have to have my OS installed with UEFI to convert my system HDD from MBR to GPT without data loss?

So as of right now I have a PC with a BIOS-only mainboard (Gigabyte 775 - GA-P35-DS3) with which I installed Windows 10 64bit on my 4TB hard drive with MBR. Now I'd like to buy a new mainboard with ...
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92 views

Getting error: Windows cannot be installed to this disk. The selected disk is of the GPT partition style

I am trying to reinstall Windows 10 on my friends machine from bootable USB. Following is what I have done till now: I created bootable USB using Windows 10 ISO and Rufus with GPT Partition scheme ...
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61 views

Installing Windows from bootable USB pendrive on UEFI enabled machine

I have 5 year old Dell XPS 15. I have installed Windows several time one it using procedure below: build bootable USB pendrive from Windows ISO using a Windows DVD/USB tool plugging in USB pendrive ...
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42 views

windows cannot be installed on this disk. The selected disk is of the GPT partition style

My problem is similar to this question: windows cannot be installed on this disk. The selected disk is of the GPT partition style. Windows 8.1 When I changed the bootmode to UEFI only and restarted ...
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50 views

How do edit the contents of my BIOS boot list?

So the other day I installed Windows 7 on a GPT disk. It works fine. Today I went to boot off my Linux Live USB and I noticed Windows Boot Manager was in the list. I use a traditional BIOS and it ...
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53 views

Windows and hybrid MBR on removable USB disk

I carry an USB thumbdrive with me. It contains a data partition, an Ubuntu Linux installation and an EFI System Partition. It uses a hybrid MBR so I can boot from it on modern EFI-only and legacy BIOS ...
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1answer
75 views

Windows 10 vs Windows 7 GPT filesystem incompatibility?

Good evening, I've got a dual boot system with Windows 10 and Windows 7 installed on one HD, and my second HD is an empty one for storing multimedia and games. Both disks are formatted as GPT. I've ...
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79 views

Hard drive corruption on a dual-boot system

Recently I've decided to buy my first SSD and install Windows 10 on it, and use one of my older HDs to install Windows 7, for dual-booting from separate drives. Both drives are connected through SATA ...
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92 views

Explaining the behavior of 8TB disk in different USB adapter

I was trying to make a backup onto a 8 TB Seagate SATA disk, so I placed the disk into a USB 3 adapter QP0020 by LogiLink and initialized the disk to be a GPT disk, using the whole capacity in one ...
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1answer
43 views

Is dual booting on a store-bought Win10 system even possible? [duplicate]

My situation: I got a Win10 system with ONE physical (afaik) HDD of one terabyte. I want to dual boot with Win8. I tried to do it, but it gave me an error that said the HDD was GPT and that I needed ...
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71 views

Windows 7 in Boot Camp can't read other FAT32 partitions

On my Mid-2009 MacBook Pro, I have OSX 10.6.8 installed, Windows 7 (through Boot Camp), and 2 FAT32 partitions. The extra two partitions are not visible to Windows 7, but they are visible on the OSX ...
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277 views

How to Using Metro Boot Manager on UEFI BIOS when Dual Boot with Linux

I have a problem when trying to set up dual boot (Windows 10 + Linux Mint 17) in UEFI mode or on a GPT disk. I cannot go back to using the default Windows 10 boot manager? In Legacy mode or on MBR ...
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1answer
213 views

How do I deploy Windows 7 to UEFI or really boot in legacy mode?

I used to deploy a windows 7 image to computers using clonezilla, after creating two partitions and setting the bootable flag on the system partition. Now however, I've got some computers with an ...
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3answers
109 views

GPT partition resizing and boot issues

I am helping a friend migrate his OS from a 500GB mechanical drive to a new 250GB SSD and have run into problems. Where to begin... His current OS is Windows 10, formatted with GPT and boasting 5 ...
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26 views

partition resize breaks EFI USB installer

I have a 64GB GPT USB stick, containing EFI installer partitions for Windows 7, Windows 10, 5 linuxes, and a Clover BootLoader to launch an El Capitan installer for Hackintosh. It all works ...
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363 views

How to change GPT partition type on windows?

The GPT format introduce far more place to metadata. To set a partition type in diskpart, one use : DISKPART> create partition msr or DISKPART> create partition efi or DISKPART> create ...
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331 views

After upgrading from Windows 7 to Windows 10, system thinks GPT partition is MBR

I have a Windows 7 system with 3 hard drives - Disc 0 is the boot disc formatted with MBR, Disc 1 is a 4 TB disc formatted with GPT, and Disc 2 is a 2 TB disc also formatted with GPT. Disc 1 has one ...
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490 views

How to do UEFI+GPT with a iso file greater than 4GB

As I understand the only way I can reformat my laptop which is gpt+uefi by default is if I crate a bootable usb that is also gpt+uefi. However the image file that I have is greater than 4GB and RUFUS ...
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Boot error loop -> /rebuildbcd error and cant set active volume

Background After my sisters three months of vacation with no internet access, she got home and many updates for Windows 10 and Norton installed. After reboot Windows didnt start instead "the boot ...
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41 views

Why isn't my system booting in UEFI mode?

I recently attempted to install Windows 10 as a dual boot alongside Ubuntu 14.04. I used WinUSB to create a bootable drive. I booted into the USB, but when I attempted to select the empty NTFS ...
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0answers
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are there any steps available to cross compile gdisk?

We need gdisk(from gptdisk) for am335x based custom board. We are using Linux OS on the board. We need to cross compile it. Is there any guide for the same ? I am not able to find any guide for the ...
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Mint Linux GPT to MBR

I am currently running Mint Linux on a PC with an old Intel Motherboard. It works just fine but I have have to select the HDD as the boot device manually upon start-up every time because the BIOS ...
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1answer
45 views

Is there are way to “calculate” the guids for a GPT partition table?

There are specific reserved guids like {DE94BBA4-06D1-4D40-A16A-BFD50179D6AC} for a windows partition or {00000000-0000-0000-0000-000000000000} for an unused partition. Where do these values come ...
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MBR protective to MBR hybrid OSX

Right to the point I wanted to install W10, but it said that it doesn't like my gpt partition. So, with the help of gdisk, I followed this tutorial MBR hybrid to MBR protective Buuuuut it turns out ...
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354 views

Recover Data on GPT protective partition

For an unknown reason, my laptop's windows 10 stopped booting correctly this week. after analysing disks, it appear that the first disk with the OS was in a terrible shape (lot of noise when ...
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65 views

Sharing folders from EFI system partition

I'm running Windows 10, and am unable to access folders I share with my local LAN boxes from an EFI partition. I have a GPT hard drive with single massive 'EFI System Partition' on it. Since Windows ...
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132 views

Windows 7 or diskpart 64 bit BIOS boot (not UEFI) can not see GPT drive

I have done bit of research already regarding my issue but couldn't find any answer yet. Kindly read my question before someone thinks it is a duplicate. I have a HP zbook 15 that came with windows ...
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2answers
491 views

When UEFI/(Motherboard Firmware), is set to UEFI(not legacy), USB is not detected

When UEFI/(Motherboard Firmware), is set to UEFI(not legacy), USB is not detected When set to legacy, it is detected. It goes without saying that I can't boot from it when the UEFI is in UEFI mode. ...
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1answer
204 views

*VERY* slow boot after changing from MBR to GPT - need to rearrange partitions

I recently changed from MBR to GPT and now my system takes over an hour to boot. I suspect a partition arrangement problem. I'm running Windows 10 on a RAID 5 array. Here is my current partition ...
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1answer
1k views

Windows 10 takes 2+ hours to boot

I am running a Dell T7600 workstation with RAID 5 configuration on a Perc 310 adapter running Windows 10. I just converted my partition from MBR to GPT. I changed the Bios to boot in UEFI mode. It ...
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how can i install windows 7 parallel to 10?

so i wanted to upgrade my laptop windows from 7 (which it came with) to 8.1, i couldn't do that because the HDD was in MBR format so i had to change it to GPT and so i did, now i'm on windows 10 i ...
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475 views

Trying to understand linux support for 4TB hard disk drive on legacy BIOS

I want to add a 4TB hard disk drive for data storage only. My current configuration: Intel Server Board S3210SH (Legacy BIOS, 2009/05/22) Running Arch Linux. Installed in a Crucial 512MX SSD ...
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2answers
3k views

Installing Windows 10 “Windows can't be installed on MBR. Convert to GPT”

Alright, it's a long story. I was on Windows 7, with 4 partitions. I decided to do a complete clean up and upgrade to Windows 10. So, while doing that, I selected the option, (I don't remember it ...
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72 views

Alternate location for GPT partition entry table

The GPT header (usually in LBA 1) has a PartitionEntryLBA field (see 5.3.2 GPT Header in the spec). There is language in various references (such as the wikipedia GPT entry) describing that field ...
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160 views

How can I clone only a bootable windows partition(not the disk) to a file?

I have a hard disk which is 1 Tb in size. I have created and installed windows Xp on a partition of size 10 Gb. I want to clone the partition to a file on another disk such that I can dd the file to ...
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59 views

Can't boot Windows 8.1 after update

I'm using linux for my day to day use. Thing is, I don't recall having any problem with my windows installation. It might be that I installed some updates and didn't restart, simply powered off and ...
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Is it possible/safe to resize non-adjacent GPT partitions

I have a partition table that looks like this. I'd like to enlarge the /dev/sda4 partition (where I have Windows) by reducing the /dev/sda9 partition (where I have the /home directory with Linux). ...