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ochinko

Member

Registered: 2022-02-15

Posts: 15

[SOLVED] Deleting a logical partition destroyed my boot

I was multi-booting Windows 7 and just done with latest Arch install on MBR. I wanted to delete one of the logical partition Windows was installed on and clicked delete partition on either nvme0n1p6 or nvme0n1p7 in Disk Management (Windows) and left it alone. After I came back to my PC, the laptop was in the Grub Rescue Menu.

Now

$ lsblk -f
NAME        FSTYPE   LABEL           UUID                                 FSAVAIL FSUSE% MOUNTPOINT
nvme0n1                                                                                  
├─nvme0n1p1 ntfs     System Reserved A6EADA08EAD9D521                                    
├─nvme0n1p2 ntfs                     786EEDEC6EEDA35C                         68G    32% /media/mint/786EEDEC6EEDA35C
├─nvme0n1p3 ntfs                     CE8AD1BC8AD1A16F                       83.6G    16% /media/mint/CE8AD1BC8AD1A16F
├─nvme0n1p4                                                                              
└─nvme0n1p5 ntfs     Program         E624102A240FFBED

Before

$ lsblk -f
NAME        FSTYPE FSVER LABEL           UUID                                 FSAVAIL FSUSE% MOUNTPOINTS
zram0                                                                                        [SWAP]
nvme0n1
├─nvme0n1p1 ntfs         System Reserved A6EADA08EAD9D521
├─nvme0n1p2 ntfs                         786EEDEC6EEDA35C
├─nvme0n1p3 ntfs                         CE8AD1BC8AD1A16F
├─nvme0n1p4
├─nvme0n1p5 ntfs         Program         E624102A240FFBED
├─nvme0n1p6 ntfs                         F8C0665DC06621DC
├─nvme0n1p7 ntfs                         F4D6AD0FD6ACD2E2
└─nvme0n1p8 btrfs                        f9df1b06-24cf-495b-9ef7-e37dd0aeff7a  374.3G     9% /var
                                                                                             /tmp
                                                                                             /opt
                                                                                             /home
                                                                                             /.snapshots
                                                                                             /

Last edited by ochinko (2022-09-22 12:58:07)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,292

Re: [SOLVED] Deleting a logical partition destroyed my boot

Why would you do these kind of operations on Windows which literally doesn't have good concepts of logical partitions with an MBR boot? Why do you even have an MBR boot on an nvme drive in the first place, it's nearly a miracle this even works in but I'd assume there are a lot of assumptions on the BIOS and operating system parts that aren't really designed around this and actually and effectively expect GPT.

Check whether you can restore the partition with testdisk/photorec or so. Other than that this is technically a Windows question so you'd need to ask on a Windows board what it's behaviours are in regards to using it's disk manager.

Last edited by V1del (2022-02-16 18:48:52)

Slithery

Administrator

From: Norfolk, UK

Registered: 2013-12-01

Posts: 5,776

Re: [SOLVED] Deleting a logical partition destroyed my boot

Did you have a question?

---

No, it didn't "fix" anything. It just shifted the brokeness one space to the right. - jasonwryan
Closing -- for deletion; Banning -- for muppetry. - jasonwryan

aur - dotfiles

ochinko

Member

Registered: 2022-02-15

Posts: 15

Re: [SOLVED] Deleting a logical partition destroyed my boot

Why would you do these kind of operations on Windows which literally doesn't have good concepts of logical partitions with an MBR boot? Why do you even have an MBR boot on an nvme drive in the first place, it's nearly a miracle this even works in but I'd assume there are a lot of assumptions on the BIOS and operating system parts that aren't really designed around this and actually and effectively expect GPT.

Check whether you can restore the partition with testrec or so. Other than that this is technically a Windows question so you'd need to ask on a Windows board what it's behaviours are in regards to using it's disk manager.

Was said that Windows 7 was more stable on MBR than GPT. Learnt my lesson the hard way, would avoid any disk-partition-related operations on Windows from now on.

I tried looking for testrec but I only found testdisk. Was that the one you meant?

Sorry for asking here, I thought since there was still a Grub Rescue Boot it was still technically Arch-related and I wouldn't mind if I lost all of my Windows to recover my Arch.

Plus, the forum help here has always been the best I've ever experienced. I have no idea what Windows boards there are, could I trouble someone to link me?

Last edited by ochinko (2022-02-16 18:38:53)

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 25,292

Re: [SOLVED] Deleting a logical partition destroyed my boot

AS mentioned, check whether you can restore the partition table with testdisk (flubbed the name there) and/or photorec.

Not sure where you got that from, GPT is definitely supported by Win 7, any UEFI capable board/operating system needs to support GPT.

Last edited by V1del (2022-02-16 18:50:40)