this post was submitted on 06 Apr 2024
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submitted 7 months ago* (last edited 7 months ago) by t0mri@lemmy.ml to c/linux@lemmy.ml
 

I was editing my disk and when i wrote the changes and exited cfdisk, no cli command worked. Thats when i realized that im f-ed up.

This what happened: I have 3 partitions, 512M efi, a 100G root partition and some free (unallocated) space. I had 84G worth data in the root patition. I totally forgot that and shrinked the root partition to 32G to extend the free space. I was using cfdisk tool for this. I wrote the changes and rebooted my machine, by long pressing power button coz no cli commands worked after writing those chrnges, to see this.

So is it possible to recover my machine now?

:_ )

SOLUTION Thanks to @dgriffith@aussie.zone. cfdisk just updates the partition table. So no worry about data damage . To fix this, live boot -> resize the partition back its original size -> fsck that partition. For more explanation, refer @dgriffith@aussie.zone comment

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[–] t0mri@lemmy.ml 9 points 7 months ago (8 children)

For sure.

For fsck /dev/nvme0n1p2:

[–] dgriffith@aussie.zone 30 points 7 months ago* (last edited 7 months ago) (6 children)

The filesystem driver knows the size of the filesystem is larger than the physical size of the partition it is on. Because of that it refuses to do anything with it until that discrepancy is sorted.

Boot to a USB/ISO, run cfdisk, extend the partition size back to original or larger, then run fsck on the partition again.

[–] t0mri@lemmy.ml 26 points 7 months ago* (last edited 7 months ago) (5 children)

😭😭😭🤧 THANKS!!

im saved. My machines saved. Thanks a lot!!

Whrt happened anyway? Why cfdisk didnt wipe the data? I thought it would everything after 32g, but all my data is un touched. What happened?

[–] toni_bmw@lemmy.world 5 points 7 months ago

It's a marvellous feeling, right?

We thank Dave for his decisive contribution. For future occasions try to backup everything before doing operations of this type. This small script works very well for me:

https://github.com/cleverwise/cya

That allows you to backup even hot systems. Just mount an external disc in /home/cya and run the script with sudo...

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