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.

learn more… | top users | synonyms

0
votes
0answers
25 views

Convert MBR based install to GPT based

I recently re-installed Windows 8.1 on my notebook, in MBR mode, since I was not able to make the UEFI recognize the flash drive as EFI bootable (then I did not make any research in this topic, but ...
1
vote
1answer
34 views

How to install Windows 8 without flash drive and dvd? GPT/UEFI

I have my new SSD, on which I want to install Windows 8.1. I have an iso image. So what I normally do when I use MBR on the drive: Create partitions Extract iso to one of the partitions Make that ...
0
votes
0answers
31 views

Recover GPT Unformatted Partition

I have a 500GB HDD, with a partition that I tried to move. After moving it, I found it is still in the starting place, but now I don't have access to it anymore. I tried to recover it with EaseUS ...
0
votes
0answers
50 views

Windows 8 in GPT not hybrid booting

Some days ago I bought a new HDD of 3TB size. I installed Windows 8 "normally", then I noticed that the system could not see all the 3TB of the disk, because the setup automatically choosed to use MBR ...
0
votes
0answers
13 views

Windows boot loader on a Pen Drive (Chain-loader)

I want to convert my hard disk to GPT and install windows 7. Which is now giving an error while installing. What I am planning to do is, Install the boot loader in MBR Partition of a Pen Drive. ...
0
votes
0answers
60 views

How to install windows 8.1 using OEM provided install.wim and boot.wim

Unfortunately, recently, my C drive got corrupted and I had to format the whole partition and reinstall the untouched windows 8. There are 2 recovery partition in my laptop which includes install.wim ...
0
votes
0answers
31 views

How can I create a software RAID mirror of the system drive after installing Windows 8.1 Pro 64-bit?

I have a brand new system with UEFI Install of Win 8.1 Pro 64 Bit. The OS is installed on a 1TB WD Drive I also have a second 1TB WD drive that is empty alongside it. They both are GPT. I'm having ...
0
votes
1answer
151 views

Clonezilla fails at cloning with mismatched GPT and MBR partition

I got this message: This disk contains mismatched GPT and MBR partition: /dev/sda Clonezilla's FAQ says: You might have installed an OS with GPT partition table, and later overwrite the ...
1
vote
0answers
130 views

Failure to create hibernation partition on GPT SSD boot drive

I've searched a number of forums and am surprised no one seems to have had the same problem as me. I have only one SSD (Samsung EVO) which is also my boot drive (UEFI, z97 board) for my desktop ...
-1
votes
1answer
114 views

Debian + 4TB SATA + md RAID - Grub won't install, or if it does, won't boot

I'm trying to get Debian 7.8 amd64 setup on an system (G3220 CPU, mobo is an Asus H81I+) onto which I've installed two 4TB SATA hard drives. I admit I'm not up to snuff on EFI and such. My goal is ...
3
votes
1answer
77 views

GPT partition table is corrupt after every one to three reboots

After 2 or three power cycles, I get the grub rescue menu. I use a Ubuntu LiveCD to check my drive status and gparted says that my drive don't have any partitions. I checked the internet and I found a ...
-1
votes
2answers
69 views

replace efi firmware with old legacy bios?

So I bought a new laptop with 64-bit windows 8 pre-installed, and in preparation for downgrading to win7 32-bit, i've been reading about EFI and MBR etc.. It seems like the firmware which boots disks ...
0
votes
2answers
2k views

Can't install Windows 7 with UEFI off on GPT drive

I need to have a dual boot with Ubuntu and Windows 7 on my notebook with UEFI. I had to turn UEFI off to install and boot Ubuntu. Now I'm trying to install Windows 7, but it says it can't be ...
2
votes
1answer
2k views

creating UEFI USB Boot stick using rufus option gives errors

I am trying to install windows 7 from a USB UEFI stick that I tried to create in vain. I read other posts on creating UEFI USB Boot sticks and found Rufus the most convenient option . However , Rufus ...
1
vote
1answer
63 views

Windows 8.1 upgrade blew out other OSes on GPT disks?

I was multibooting an EFI laptop. The laptop was using GPTs, was using SecureBoot, and it had Windows 8.0, Ubuntu, Fedora and Debian on it. I updated the laptop to Windows 8.1 through the free App ...
0
votes
0answers
60 views

Why does UEFI BIOS only identify a 2TB drive on a 25TB virtual drive?

I configure a RAID6 using 16 2TB disks, and finally get a 25TB virtual drive as shown in LSI MegaRAID BIOS. And then I boot via a USB stick and try to install 64bit Ubuntu 14.04 on it. At the ...
0
votes
0answers
14 views

Is it safe to convert this partition table from GPT to MBR? [duplicate]

I think I need to convert my partition table from GPT to MBR in order to fix a problem with the bootloader. Here is the output of gdisk -l /dev/sdb GPT fdisk (gdisk) version 0.8.8 Partition table ...
2
votes
2answers
1k views

GPT Protective Partition

I’ve moved my 3TB hard drive to another USB enclosure, and it no longer works. Disk manager says “2794.52 GB Healthy (GPT Protective Partition)”. How to fix that? I don’t want to reformat, I need ...
5
votes
3answers
6k views

Tried to use my 3TB drive in a USB enclosure, now reports only 746GB even internally

I have two 3TB Hitachi 5k3000 Desktar drives that I want to use as data drives, not boot drives. When I was originally trying to install them I wanted to mirror them using my hardware raid but I ...
1
vote
3answers
1k views

3TB Western Digital green showing as only 746GB in disk management?

I've just purchased a new hard drive (3TB Western Digital Green) with the intention of transferring everything from my hard drive that has sector issues and is causing BSODs. The problem is, the new ...
8
votes
4answers
62k views

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 ...
0
votes
0answers
14 views

how to install windows 7 on GPT disk partition [duplicate]

I try to install windows 7 on my laptop. The partition I try to install it on is in NTFS format. When I clicking thorugh the installation steps and come to the part were I'm going to choose where ...
0
votes
0answers
83 views

How to restore a DriveImage Backup to a GPT-based system drive

I just bought a new laptop and was trying different things on it. I backed up my system partition with DriveImage XML and made a clean install of Windows to test something new. Later, when I tried to ...
0
votes
1answer
93 views

mSATA size mismatch and inaccessible partition strangeness

Trying to do data recovery on an mSATA SSD from an Acer laptop... Kingston SMSR150S3/256GB First symptom was simply Windows not booting. Older history of the disk from when the laptop was purchased ...
14
votes
2answers
14k views

What are the differences between MBR vs GPT vs any other partition scheme?

Can anyone tell me what the main differences between i.e. MBR vs GPT or any other partition scheme are? Why would one choose one over the other? I am not an expert but from new release of Mac OS X ...
3
votes
1answer
313 views

Unsupported GPT detected. Use GNU Parted

I'm installing Android-x86 in Dell XPS on SSD disk. I use GPT on SSD disk as follows with using gparted. $ sudo parted -l /dev/sdb Model: ATA SAMSUNG SSD CM85 (scsi) Disk /dev/sdb: 32.0GB Sector ...
7
votes
4answers
34k views

Using GParted to convert GPT to MBR without access to an OS

I wiped my Windows 8 thinking I could install Windows 7 x86 but I can't because the disk is GPT. I need to convert to MBR. I'm trying to use GParted to convert to MBR but it seems GParted can only ...
0
votes
1answer
43 views

Layouting a disk image and copying files into it

Before asking here, I tried to search on SU/SE and Google without success. This is the closest thing I got. Basically, I'm trying to do the following: - create a disk image of about 128MB; - create ...
0
votes
1answer
135 views

installing 32-bit windows: diskpart convert mbr error

I have an efi-based 64 bit system with win 8 pre-installed. I want to downgrade to 32-bit win 7 and so I booted up a bootable win 7 usb and opened command-prompt with shift+f10. I used convert mbr ...
0
votes
1answer
89 views

How do I convert an EFI System Partition into a normal GPT partition?

I had a Windows 8.1 that required a re-install. In the process, my 4TB secondary disk is now showing up in Disk Management as an EFI System Partition, with no volume. In DISKPART, a volume is shown, ...
8
votes
1answer
23k views

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: ...
0
votes
1answer
927 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 ...
3
votes
5answers
384 views

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 ...
-2
votes
1answer
33 views

What is the use of a Read Only partition?

What is the use of a read-only partition? I am particularly interested in gpt-formatted disks. If the partition is read-only, then data cannot be written to it. If we're reading data from it, then how ...
3
votes
1answer
1k views

Windows 7 + Ubuntu dual boot + conversion to GPT

I have received a new Lenovo T420 laptop with Windows 7. The disk now contains: a hidden SYSTEM_DRV boot partition (1.17 gb, 400mb used). I'm guessing this is the EFI partition, the laptop comes ...
3
votes
3answers
4k views

Windows backup “Volumes larger than” error

A week ago I started getting the Windows Backup error 0x807800B4, stating "Volumes larger than 2088958 megabytes cannot be protected." I'm not sure what this is referring to. My system volume is a ...
0
votes
1answer
2k views

3TB raw hard drive partition recovery stymied by GPT

I have a seagate 3TB external hard drive with GPT. I accidentally pulled out the power cord and upon reboot was faced with a Raw Partition message in Windows Explorer re: You need to format your drive ...
1
vote
0answers
36 views

How to change the partition scheme

I want to change the partition scheme in my 500 GB HDD from MBR to GPT scheme without losing DATA on it. What are the traditional tools to do this on both windows 7 and Linux(ubuntu)? And what are the ...
14
votes
5answers
10k views

Is there any way to boot Windows 7/8 using BIOS on GPT?

I'd like to know if there's a method to get Windows 7 or Windows 8 Developer Preview to install to a GPT disk on my traditional IBM PC BIOS setup. Windows 7, of course, rejects my GPT partition, ...
0
votes
1answer
249 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 ...
1
vote
2answers
43 views

Remove GPT filesystem on USB

I have an old 8GB USB stick with a GPT filesystem hanging around. I'd like to move it to a more familiar fs, as NTFS or FAT32, but the usual mkfs doesn't seem to work since there is no /dev/sdb1 (as ...
0
votes
1answer
206 views

Windows 7x64 pro formatting of ST6000NM0024 6tb drive

I'm wondering if anyone is having success installing one of these drives into a Windows 7 Pro x64 system. I'm able to: attach the drive see it in my BIOS boot Windows, bring up the Disk Management ...
2
votes
2answers
724 views

real number of sectors on HDD

This is part of output of fdisk -l Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector ...
1
vote
1answer
5k views

Change GPT partition file system type with parted

When I created my GPT partitions using parted, I was using ext2 file system type perviously: $ parted /dev/sdc print | grep ^12 12 961GB 1118GB 157GB ext2 msftdata Now I ...
1
vote
1answer
61 views

How do I migrate a single drive (no RAID) running under RAID controller, to AHCI mode without losing the GPT partition on it?

I have a 3 TB drive formatted with the GPT partition style. I use it for data on my Windows 7 PC. I've made the drive accessible via the mount point D: My motherboard's HDD controller mode has been ...
1
vote
2answers
487 views

GParted leaves 1MB unallocated space at end of external HDD, override/alternative?

I only say external HD, I don’t have this issue with internal HDs. I created a GPT table, then made one NTFS volume. It shows 1MB unallocated at end of disk. I know it is a backup of the GPT table, ...
0
votes
0answers
65 views

What is the difference between boot manager and boot loader in windows ? Can you have multiple hard drives with different boot manager?

What is the difference between boot manager and boot loader in windows ? Can you have multiple hard drives in a computer with each drive with a different boot manager ? I recently put multiple hard ...
0
votes
0answers
112 views

Does each hard drive need EFI\ESP, MSR system partition if you want to install operating system(s) on each drive?

Suppose, there are at least 5 hard drives: drive1, drive2, drive3, drive4, drive5, .... We want to use first 3 drives to install 5 operating system: windows 8.1, windows 7, windows vista, windows xp, ...
1
vote
0answers
65 views

Windows install on GPT with multiple drives

I've got quite an interesting system configuration here, and I would like to install Windows 10 preview on it. I have 3 drives, out of which one is a SSD. They all have a GPT table. Drive 0 (the ...
-1
votes
1answer
147 views

How to make a UEFI partition explained [closed]

I have a samsung np300ex, in the bios i have enable UEFI running Archlinux (3.17.2-1-ARCH #1 SMP PREEMPT Thu Oct 30 20:49:39 CET 2014 x86_64 GNU/Linux) i'm using syslinux as bootloader. I've never ...