Here's my problem:
I have a Virtual Machine that I had to reset because the UI became very buggy after I tried to mount a hot-pluggable virtual disk image to copy some files.
Well that was actually premature, should not have done that - but shit sometimes happens.
The Virtual Disk is encrypted with luks1 and the file system used is btrfs.
I also have backed up the virtual disk in working state.
I made some changes to the certain files [a password db and my firefox profile &
some other documents] that are not in my last backup.
Therefore I would like to restore my btrfs partition
When I enter the password the following error appears (when I start up the vm):
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Enter passphrase for hd0,gpt2 (91188ec2-c31a-4812-a8c8-654cf5c793fb):
Attempting to decrypt master key...
Slot 0 opened
error: unknown filesystem
grub rescue>
- GParted Corrupted Partition
- VM POS GParted CorruptedPart luksOpen.png (406.47 KiB) Viewed 720 times
I tried to restore the partition using a live-system
but the partition is not mountable
Since I backed up the corrupted virtual disk to a safe location.
I am capable to start over if something goes sideways.
Just need to copy the corrupted virtual disk from backup location to
working directory of the VM. So creating an image of my vm partition won't be necessary
GParted shows the follwing errors
when I open the information window for my btrfs partition.
So it does not recognize the filesystem.
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Encryption: luks
Path: /dev/mapper/sda2_crypt
UUID: 91188ec2-c31a-4812-a8c8-654cf5c793fb
Status: Open
Partition
Path /dev/sda2
1st Sector: 618496
Last Sector: 188731619
Total Sectors: 188113124
Warning:
Unable to detect file system! Possible reasons are:
- The file system is damaged
- The file system is unknown to GParted
- There is no file system available [unformatted]
- The device entry /dev/mapper/sda_crypt2 is missing
[GParted vm disk image corrupted][1]
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I used btrfs-tools and testdisk:
Command: btrfs rescue super-recover /dev/mapper/sda2_crypt
Output: No valid btrfs found on /dev/mapper/sda2_crypt
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Additional Info's:
The ssd's of my host system and it's partitions are in healthy state - so no issues here!
The vm is an efi system & uses gpt as partition table!
The screenshots from GParted show the disk before the Data Corruption occurred:
- GParted Healthy Partition
- VM POS GParted OS Intact.png (440.14 KiB) Viewed 720 times
dmesg shows an this error message when I attempt to mount the my btrfs partition
with this command: mount /dev/mapper/sda2_crypt or /dev/sda1
/dev/mapper/sda2_crypt: Can't open blockdev
/dev/sda1: Can't open blockdev
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Command:dmesg | tail
Output: systemd-gpt-auto-generator[3165]: (the boot loader did not set EFI variable LoaderDevicePartUUID.)
systemd-gpt-auto-generator[4398]: EFI loader partition unknown, exiting.
This output shows a few time with diffrent numbers between the [].
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Command: hexdump /dev/sda2 | grep LUKS
Output: 00000000 4c 55 4b 53 ba be 00 01 61 65 73 00 00 00 00 00 |LUKS....aes.....|
So I guess the luks header is still there!
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The testdisk results: see attached Code (testdisk log!)
I would like to restore the partition to working state.
Help would be appreciated
testdisk log: