Questions tagged [gpt]

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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how to create a partition after windows10 installation

I need to create a partition to keep some drivers (preferably at the end of the disk/ssd); I'd shrink the data partition and then created a new one using the UI and the following steps: New simple ...
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Converting a partition to EFI boot, at a particular location on disc, from scratch

I have a drive that developed a boot failure after a crash, with the BSOD error code 0xc0000098. It was one of those crashes that proved utterly resistant to every technique I know for BCD recovery (...
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Merged partitions show as unformatted NTFS- GPT table recovery

Wanted to merge multiple partitions on my SSD, and added Windows Recovery partition to the mix as it was sitting between other data partitions. (I believe this was my mistake). Used MiniTool Partition ...
tomahawk_pt's user avatar
2 votes
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How is the "active partition" determined when using GPT?

According to https://superuser.com/a/1081043/380318 there is no such concept as an "active partition" when using GPT. AFAIK with MBR partitioning, some minimal code in the MBR looks for an &...
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Understanding why Windows boot fails when EFI partition is moved

Situation I got a new computer with a HDD. I put SSDs in it and made RAID1, then started installing Windows Server 2022. I wanted to use SSDs and a HDD for data. I noticed the HDD already had some ...
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How can I change a GPT unique partition GUID on windows?

According to the GPT section found in chapter 5 of the UEFI specification version 3.6.0, every GPT partition entry has a unique GUID at byte offset 16. My question can kind of be broken up into 2 ...
EatingTechnobladesRemainsAt3am's user avatar
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GPT Table repair after dd disc clone

I used dd to clone a 500gb Hard Drive to a 256gb SSD before doing this I edited the partitions so that the last 280gb (roughly) was unallocated using GParted. Eventually dd ran out of room at 240gb, ...
Pizza's user avatar
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BSOD after update, now crashes if a specific HDD is plugged

I was getting a bootloop with "automatic repair" I finally managed to fix it by leaving only my OS ssd plugged in and booting to windows, then it showed a "something went wrong rolling ...
Daviid's user avatar
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Why does a GPT formatted disk have the MBR? Protective MBR

Could you explain how Protective MBR works? As far I know, Protective MBR uses for backward compatibility with old software that was used for MBR. But how those programs see the disk? So, if you use ...
 NAD 's user avatar
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grub2 cannot detemine new created nvme1n1

I add drive nvme1n1 GPT, add the partition nvme1n1p1 (ext4) Here some outputs: lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 55.6M 1 loop /snap/core18/2667 loop1 ...
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Convert my drive from MBR to GPT

I installed windows 10 in MBR partitioned table. Due to mistake, I delete c:/ drive data and want to install fresh windows but it requires GPT partition table whereas my D & E drive were in MBR ...
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Convert MBR to GPT Using MBR2GPT || Unable beacause System Reserved partition

I would like to upgrade to WIN11 and i am not able since i am no capable of enable secure boot. In order to be able, the disk has to be GPT MS has a great tool to convert to MBR to GPT: MBR2GPT , ...
ALEJANDRO LV's user avatar
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Can't mount external USB drive. mount: /dev/sdd1 is already mounted or /mnt/sdd busy

I'm trying to mount my external hard drive with this command on my Citrix hypervisor; mount -o rw /dev/sdd1 /mnt/sdd But I'm getting this error: mount: /dev/sdd1 is already mounted or /mnt/sdd busy ...
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Stuck on this MBR2GPT (Cannot find OS Partition) issue

I'm trying to use MBR2GPT to convert an MBR/BIOS disk to GPT/UEFI. I'm getting the error Cannot find OS partition(s) for disk 4. I found this in setupact.log: 2022-12-07 15:38:24, Info ...
Vikthor Ferreira's user avatar
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Copy Win10 partitions plus a partition from another disk onto new drive

My goal is to copy the four partitions associated with Windows 10, plus a fifth partition that I have on another drive. The Windows partitions are on an MBR drive, the fifth partition is on a GPT ...
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Stuck on MBR2GPT issue

I wanted to convert my MBR Windows disk to GPT because I cannot upgrade to later Windows versions. Found the in-place upgrade tool (mbr2gpt) but running into multiple problems. This is my Disk ...
InSr33's user avatar
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-1 votes
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Recovering GPT table after failed volume merge

Background. I shucked a 14TB wd drive. I didn't realize it was exFAT and I wanted NTFS security features (for what it's worth). Upon finding out exFAT was hard to convert and I only had 1.3TB used (I ...
Krustylicious's user avatar
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HDDs are displayed with 115.5 PiB Capacity after reboot

I'm running OpenMediaVault on a raspberry pi and added 3 new 4TB HDDs to the system. After a reboot all drives are displayed with 115.5PiB capacity and matching sector counts (253879390758563) - not ...
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Can't use or install Microsoft Windows after changing disk to GPT partition style to use Linux

I am having some trouble installing Windows or using it, originally I had an MBR partition table which only allowed three partitions and I wanted to install Linux and I couldn't so I changed MBR to ...
DanielJMMW's user avatar
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How do you restore a GPT partition to a legacy bios device?

I have a UEFI computer with a GPT-partitioned drive. On this drive there is an EFI system partition, a second partition with a bootable Ubuntu system, and lots of unallocated space. I'd like to ...
vincebel's user avatar
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1 answer
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Moving OSs from 1TB to 2TB

I have a 1TB nvme drive with windows and linux installed. The partitions look like this: partitions Now I would like to move both these operating systems to a 2TB nvme. How do I do this without ...
thewolf's user avatar
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how to extend partition space with Samsung recovery deleted partition unallocated space? (diskpart)

Note: the disk is Formatted as GPT and I have only one disk. I have a Samsung laptop `300v5a` that came with windows 7, and I upgraded to windows 10 after that I deleted the Samsung recovery ...
Mohab13's user avatar
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I see my 2nd GPT hdd partitions but not the 1st drive's

I have 2 hdds in my laptop. I had them all converted to UEFI. one day I notice one has reverted to MBR. I used EaseUS to initially convert them. I went back to EaseUS when I noted the reversal on ...
CityguyUSA's user avatar
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Windows no longer boots after converting boot disk from MBR to GPT and back to MBR

First my system (as it is now): Gigabyte Z690 Gaming X DDR4 (BIOS Version F8b) Intel i7-12700F 32GB Corsair memory Windows 10 Pro with all updates Samsung 840 EVO 250GB (as boot drive) Samsung 870 ...
CliffP's user avatar
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9 votes
2 answers
3k views

Dual Boot between Win 7 and Win 11

I have a notebook from my company that was installed Win 7 MBR + Legacy. I need to install a few programs, but they are not compatible with Win 7 anymore and I can't upgrade or do a clean install ...
Emanuelson 204's user avatar
1 vote
1 answer
325 views

What should be the content of the first sector in a UEFI system with GPT partitions?

As i understand, in UEFI machines there is no MBR/VBR code, and the UEFI firmware directly gives control to the OS boot loader (.efi file). My question is, what should be first sector of such system ...
OneAndOnly's user avatar
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Windows 10 System and Boot partitions are on different drives

So I'm trying to convert my drives to GPT so I can upgrade to Win 11, however my system and boot partitions are on different drives. The problem is that these are my largest two dives, are are both on ...
Ben Rauzi's user avatar
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Unable to Launch Partition

I have deleted Linux partition from my drive and now I cannot see it, only empty drive. After typing diskutil list: /dev/disk0 (internal, physical): #: TYPE NAME ...
Noz_Char's user avatar
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3 answers
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How to normalise Win10 MBR partition to migrate to GPT and standard EFI

My aim is to be able to upgrade to Windows 11. It was originally a Windows XP installation, that went through all the upgrades to WinVista, Win7, Win8, Win8.1 and Win10. With my upgrade path I never ...
rarog4k's user avatar
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2 answers
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Clonezilla: "mismatched GPT and MBR partition". GPT deletion made the system unbootable

Using Clonezilla on a thumb drive to create a system image, in order to clone disks from it; Clonezilla threw an error: "mismatched GPT and MBR partition" and refused to proceed; Searched ...
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Boot Windows (7,10,11) installation in GRUB on GPT partittioned USB

The question is why chainloader +1 works with MBR partittioned USB and can boot with bootmgr but GPT version of my USB stick brings me back to GRUB console after chainloading? Also no luck with ntldr /...
Max's user avatar
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2 answers
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UEFI does not list old MBR installed windows 10 in boot options

this is the situation: I had an old PC running on bios and only MBR, I had bought a SSD for it and migrated the updated windows 10 to it and it was working fine. So I decided to build a new PC but to ...
A. choofe's user avatar
1 vote
0 answers
69 views

Possible to boot OS originally installed MBR after converting disk to GPT?

I have Windows 10 and 7 on my hard disk. I installed Windows 10 on a partition on the disk, GPT, converted the disk to MBR, installed Windows 7 on another partition, then converted the disk back to ...
Alcatel's user avatar
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Disk partitons - extend option greyed out

I have 2 physical disks. One as C: drive, basic type, second, about 700G big disk, contains one 475G ExFat partition, and behind it there is unallocated space about 223GB Yet if i open disk manager ...
Peminator's user avatar
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Any way to bypass/restore HDD sector count [duplicate]

I have a WDBU6Y0020BBK external hard disk which recently died for no apparent reason. It was making no strange noises, had no reported SMART issues last time I checked, and wasn't even that old. ...
Y_Less's user avatar
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0 answers
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Dual boot W7 and W10 second partition not working

Disk type is GPT I have installed Windows 7 then made full backup using Aomei Backupper Then wiped disk and installed Windows 10 and made full backup using Aomei Bacupper. Then wiped disk and restored ...
Roman Toasov's user avatar
1 vote
1 answer
623 views

VirtualBox does not boot hybrid GPT/MBR, neither EFI nor MBR

The same version of VirtualBox on the same installed Debian system does not boot from the raw disk USB flash drive, while on the other system it does, it is also possible to boot the USB flash drive ...
n7rc's user avatar
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0 answers
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Slow MDADM Raid 5 reads/write speeds

I set up a Raid 5 array from 4x4TB drives with mdadm. But the writes/reads are quite slow and I want to find out why. It isn't CPU-bound as the CPU usage during I/O operations is only around 10%. I ...
1234filip's user avatar
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2 answers
3k views

"Advanced Options" Fails to return "Command Prompt"

Pursuant to converting Windows 10 from BIOS to UEFI. The procedure calls for invoking the Command Prompt under "Advanced options", so as to invoke from the command line" mbr2gpt /...
gatorback's user avatar
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How to remove bad sectors from SSD disk, format, create partitions and install win 10

Upgraded my disk to a new SSD but seem to have screwed it by not realising that my Dell desktop Vostro was only a MBR bios and I tried to create a GPT system partition. Now after many and varied ...
alfiepanda's user avatar
1 vote
1 answer
3k views

How to create a boot USB flash drive with DOS and GPT/UEFI?

I need to run a DOS application from the flash drive on boot, so I can create a backup image of the main hard disk. I have been doing this procedure for many years so far, but my new laptop is ...
Guybrush's user avatar
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1 vote
1 answer
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Unable to convert to GPT to install Windows 10 home

So first I did a factory reset once installing my NVME M.2, and that's when Windows had the first issue of not running. So I tried installing a fresh windows 10. When trying to make a save location ...
Shimmy1's user avatar
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1 vote
0 answers
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How to create gpt partition without the 16MB reserved partition?

Anyway to use diskpart or another program to create gpt partition without it auto creating the MSR partition? This is for a 5tb drive so can't just use MBR. I need a single unformatted raw partition ...
House3272's user avatar
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0 answers
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MBR2GPT validation failing

Same issue as:MBR2GPT: Disk layout validation failed for disk 0 I've tried all of the solutions here. This is my diskpart and MBR2GPT log. This is my Disk management window. As you can see, I have ...
Matt Griffin's user avatar
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0 answers
392 views

External drive (GPT) crashes file explorer in Windows 10

I was trying to to save data on my external drive which I used a few weeks ago normally (1Tb, NTFS, GPT) but it keeps crashing my file explorer and I am not able to fix it any other way than ...
Paul98's user avatar
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2 votes
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Is there a Powershell equivalent to Diskpart's "gpt attributes"?

I need to remake several batch scripts that use diskpart for partitioning in Powershell. One of them "hides" the Windows recovery partition thusly: select disk 0 select partition 4 set id=...
16jms's user avatar
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Getting "Bad Disk" and unbootable/readable disk after "Convert MBR Disk to GPT Disk" (Minitool PW)

I was having my MBR disk with my main OS (Windows 10) and many important files on it. My disk is Samsung SSD 860 EVO 500GB Sata with good health. I have run Convert MBR Disk to GPT Disk on it and ...
Omar's user avatar
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MBR2GPT /validate failed [duplicate]

I have an SSD that is currently MBR. I want to convert it to GPT to use UEFI mode instead of BIOS, so I can use windows 11. I did MBR2BPT /validate /disk:0 in windows recovery mode cmd, and it failed. ...
Kirk KD's user avatar
5 votes
0 answers
14k views

MBR2GPT failing with "Cannot find OS partition(s) for disk 0"

I'm trying to use MBR2GPT to convert an MBR/BIOS disk to GPT/UEFI. I'm getting the error Cannot find OS partition(s) for disk 0. I found this in setupact.log: GetOSDeviceVolume: Cannot get NT path for ...
user1552251's user avatar
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1 answer
57 views

Windows Backup failure creating system image

On a UEFI W10 computer Windows Backup fails to create a system image, there's some VSS (Volume Shadow Service) errors logged with detail "the requested system device could not be found". I ...
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