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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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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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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Secondary Internal HDD Vanishes/Reappears Randomly In Windows 8.1

To clarify, I'm referring to entire disks disappearing, not just partitions. The PC in question is an HP Pavilion 2325DX. Both drives are variants of HGST. One is in the primary slot, the other is in ...
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395 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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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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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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install windows 8 in GPT style hard disk

I have an Acer Aspire E15 laptop, of my friend, in which I have been trying to install Windows 8 but I am unable to do so. It has 4 partitions: Partition 1: total: 900MB - free: 900MB - type: Primary ...
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Clean install of Windows 7 Pro 64-bit on a UEFI laptop with GPT partition?

I’m currently pulling out hairs about a problem with my wife’s new Samsung Book 9 laptop. it comes preinstalled with Windows 8. She wants Windows 7 Pro. I’ve board a Windows 7 Pro 64-bit for her and ...
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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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432 views

Windows 10 UEFI Installation

I am trying to do a clean install of Windows 10 on ASUS N550JX. I have a Samsung 850 Evo SSD. I have deleted all my partitions using GPARTED. The problem is whenever I boot up my USB containing ...
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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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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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777 views

HDD only visible from Linux, GParted says “unallocated partition”

My Western Digital Caviar Green 3TB HDD suddenly is unrecognized by Windows 7. It's an external My Book drive, but plugging it vía USB from his case is unrecognized by Windows 7 or Linux, so I have to ...
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76 views

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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2answers
435 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 reading/...
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47 views

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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Can't boot into linux on gpt-partition external drive on a pc

I've got an external HDD "Seagate Backup Plus 1TB". It's partitioned using the GPT scheme and carries two file partitions, an hfs+ OSX partition with OSX operating system installed, and an ext4 ...
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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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68 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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137 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 8....
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685 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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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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256 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 setup:...
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644 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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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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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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3k views

Install Windows 7 after Ubuntu: Cannot install because of GPT partition

I'm trying to install Windows 7 on a NTFS partition after installing Ubuntu 14.04. But it says that I'm using a GPT partition. The solution I found was to erase everything, then install Windows 7 then ...
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187 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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60 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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34 views

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). ...
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471 views

Is it possible to convert from MBR to GPT, keeping installation and programs?

I have Windows 8.1 on a standard MBR partition. The actual configuration on the hard disk drive is like this: Partition Type Size Offset Partition1 Primary 268GB ...
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270 views

external hard drive rescue mbr to gpt to mbr

good day all I am a slightly losing my mind at the moment. I recently bought a flashdrive for backup livecd/rescue purposes,but I am a day to late. I have an external hard drive, 2TB Seagate - file ...
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76 views

windows 8: this is a boot disk

My wife's win-8 laptop has a bad hard drive. I'm trying to get her a new SSD. I set up the new disk, cloned (not copied but clonezilla) the four partitions from the old disk to the new disk, and ...
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1answer
50 views

How to make recovered windows partitions bootable?

I have the following situation: I have a "backup" of a failed/non more existend disk which has an exact copy of all its partitions but the difference that it has no bootloader or what so ever and it ...
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1answer
380 views

4TB drive only showing as 1.6TB?

So as the title says I have a 4TB drive I want to add as a secondary drive in my PC. I will not be booting off this drive. It is new, and not formatted in any way. I'm running Windows 7 Pro 64bit SP1 ...
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2answers
812 views

How to repair a Windows Boot loader damaged by GParted?

My notebook has two disks (there is a third disk -/dev/sdb - that is cache for the second disk). Windows 10 is on the second disk (/dev/sdc) (SATA ODD) and was working very well until today. Ubuntu ...
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49 views

Windows cannot be installed on this disk. The selected disk has an MBR partition table. On EFI systems , Windows can only be installed to GPT disks [duplicate]

I want to format c drive and reinstall windows 8. previously I've installed windows 8 and ubuntu together in same C drive in separate partitions.previously I've configured ubuntu grub to select which ...
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33 views

Harddisk failing controller [duplicate]

My 2-year old Seagate 3TB hdd is failing. At first, Windows 7 was giving error id 11 (The driver detected a controller error on \Device\Ide\IdePort1), then the drive appears to work very slowly, with ...
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Bootcamp Partition Issues

Okay, so I have OS X 10.11 and Windows 8.1 partitioned on my computer, I installed windows using efi. I decided to add an additional partition to my computer, but windows decided that it didn't like ...
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252 views

Whole disk encryption on a tablet (that has no pre-boot keyboard)

I am researching methods to encrypt whole disk on tablet. I would like to encrypt my tablet that comes with Dual Boot OS, with pre-installed Windows 10 Home and Android 5.1. Let's start with what ...
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81 views

Windows 10 volume converted from MBR to GPT, how to readd recovery command line console?

I decided to do what you're not supposed to do and convert my MBR install of Windows 10 to GPT. I used Paragon Hard Disk Manager 15 for the conversion, it worked fine, and I managed to get boot ...
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1answer
15k views

Windows 10 Tech Preview error: “Windows cannot be installed on MBR disks”. My hard drive is GPT. Why am I getting this error?

I'm trying to install the Windows 10 Technical Preview from a USB drive. The hard drive I'm trying to install on has multiple partitions and is formatted with a GPT partition table. When I start up ...
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1answer
448 views

Freeware MBR to GPT conversion in Windows without data loss [duplicate]

I recently had to rehouse an 8 TB drive due to damage to the micro B socket. It has only ever been one partition. Windows 8 and Windows 10 incorrectly identify it as being split into 3 partitions. One ...
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49 views

Move bootmgr from one drive to another (EFI)

My computer currently boots from my HDD, then loads the system located on my SSD. In the following picture, disk 0 is my HDD that contains the boot manager, and disk 1 is the SSD I want to boot from. ...
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50 views

Arch-Win7 dual boot laptop freezes, and then is unable to boot

I have a Dell Precision laptop, with a Arch-Windows 7 dual boot, 64bits systems, GRUB2 as boot loader, and a single SSD. I found myself browsing around for reasons which I will not explain to this ...
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Should I care about manufacturer-specific GPT partition type for boot partition?

Laptop Lenovo g710 (UEFI) with preinstalled Windows. Going to format disk (GPT) to install linux. EFI System partition GUID (common) - C12A7328-F81F-11D2-BA4B-00A0C93EC93B Lenovo boot partition GUID ...
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Windows detects GPT disk as MBR in EFI boot

This disk is OCZ VERTEX 128GB SSD. It is formatted as GPT from OSX. The disk layout is, /dev/disk1 #: TYPE NAME SIZE IDENTIFIER 0: ...
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I have a corrupt gpt with a luks partition. How do I recover the disk?

I encrypted my drive about a month or so ago with LUKS(through Gnome Disks). It was working just fine and I restarted my computer, then Some time later I tried to access the drive and it wasn't there.....
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4k views

How do I repair Windows 10 UEFI/GPT disk which is left unbootable after deleting partitions?

I recently upgraded from Win8 to Win10. The Win8 machine was in a dual boot with Ubuntu on an 80GB SSD. After the update and a few other issues I created while messing around with GRUB, I'm now left ...
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Is there a master list of gpt type codes?

The Wikipedia article on GPT lists a few dozen codes, but I've found some that are not on the list (especially by dumping an Android partition table). Is there a master registry of these codes? Also,...