Broken drive partitions after resize and move with kde partition manager

fkwilczek · 12-19-2022, 01:58 PM

I broke my btrfs partition after moving and resizing it with kde partition manager. I tried to move my partition and shrink it. This process was uninterrupted. I tried fixing partitions using testdisk but it failed.

Code:

Disk /dev/nvme0n1 - 2000 GB / 1863 GiB - CHS 1907729 64 32

The harddisk (2000 GB / 1863 GiB) seems too small! (< 2167 GB / 2019 GiB)
Check the harddisk size: HD jumper settings, BIOS detection...

The following partition can't be recovered:
     Partition               Start        End    Size in sectors
>  Linux filesys. data    330485632 4234186623 3903700992 [fedora_localhost-live]

[ Continue ]
btrfs blocksize=4096 Backup superblock, 1998 GB / 1861 GiB

Repairing by using btrfs also failed.
However when i tried using photorec i was able to recover uncorrupted files.
Is it possible to recover my btrfs partition?

lsblk command:

Code:

[root@localhost-live liveuser]# lsblk
NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
loop0         7:0    0   2.1G  1 loop 
loop1         7:1    0   7.3G  1 loop 
├─live-rw   253:0    0   7.3G  0 dm   /
└─live-base 253:1    0   7.3G  1 dm   
loop2         7:2    0    32G  0 loop 
└─live-rw   253:0    0   7.3G  0 dm   /
sda           8:0    1   7.6G  0 disk 
├─sda1        8:1    1   2.2G  0 part /run/initramfs/live
├─sda2        8:2    1   9.9M  0 part 
└─sda3        8:3    1   300K  0 part 
zram0       252:0    0     8G  0 disk [SWAP]
nvme0n1     259:0    0   1.8T  0 disk 
└─nvme0n1p3 259:4    0   1.8T  0 part 
nvme1n1     259:2    0 476.9G  0 disk 
└─nvme1n1p1 259:1    0 476.9G  0 part /run/media/liveuser/7b9cdf1f-7d32-477e-bb6a-0aaffbde72b3

mrmazda · 12-19-2022, 06:47 PM

Quote:

Originally Posted by fkwilczek

Is it possible to recover my btrfs partition?

I seriously doubt it. Managing BTRFS's multiple devices requires unique care. Did you read any instructions before opening the KDE partitioner? Try reading these and see what you think.

syg00 · 12-19-2022, 08:13 PM

I too would vote no (without having tried). I'm surprised something as mature as KDE would let you even try.

I have long been a proponent of btrfs, but I never use it for my root filesystem - I manage backup/restore for that myself. For data, I find snapshot irreplacable.

computersavvy · 12-19-2022, 08:38 PM

BTRFS is not nearly as mature as most other file systems used on linux. Most users are not familiar with management and tools that work well on other file systems often work poorly or not at all with btrfs.

As stated above, I still use LVM and EXT4 for my file systems since that technology is mature and stable. Maybe when btrfs has matured more I will consider it but so far I avoid it like the plague for my critical machines.

fkwilczek · 12-19-2022, 10:07 PM

My problem is that I need help with data recovery.

syg00 · 12-20-2022, 01:19 AM

I would think you should consider yourself fortunate to have managed to recover what you have since btrfs isn't specifically listed as supported by photorec.
If testdisk can't help with the partition recovery, I'd reckon your chances using FOSS tools are diminishingly small.

colorpurple21859 · 12-21-2022, 05:30 AM

Maybe recreating the original btrfs partitions with fdisk and run btrfs-scan and btrfs-check on the partitions will allow recovering of data.

computersavvy · 12-21-2022, 10:03 AM

Quote:

Originally Posted by colorpurple21859

Maybe recreating the original btrfs partitions with fdisk and run btrfs-scan and btrfs-check on the partitions will allow recovering of data.

This may or may not work since btrfs normally is used with a volume in the partition and subvolumes within the file system (root volume) on that partition.

The fact that the OP was able to recover files is good and I would rather suggest that he reinstall; then in the future never use tools that are not designed for btrfs on a btrfs file system.

colorpurple21859 · 12-21-2022, 12:23 PM

Quote:

This may or may not work

I agree it is a shot in the dark.

fkwilczek · 12-22-2022, 02:24 PM

I gave up on trying to recover partition and I reinstalled system. But I still have img of drive so I'm open for ideas.

computersavvy · 12-22-2022, 02:39 PM

Quote:

Originally Posted by fkwilczek

I gave up on trying to recover partition and I reinstalled system. But I still have img of drive so I'm open for ideas.

Try different things and if something works then let us know what happened.