Please help me, guide me with Linux and deleted files from 3 disks from a NAS that is in raid 5

[kiptanoi]

Hi
I got 3 disks in my Netgear ReadyNAS in raid 5.
(And I think the directory to the folder I want to restore is: "data/Dokument"
So I want to get deleted files and restore all folders and files listed in the "Dokument" folder

Now.... I have take my 3 disks and put them in my computer.
Load up Ubuntu from a USB....
installed extundelete.

When I am in Ubuntu and in files, I can see this:
Computer - is the USB?
0e362876:root - 2.5 GB / 4.0 avaible /dev/md0
0e362876:data - 1.9 GB / 8.0 avaible /dev/md127

When I go in to "0e362876:data" I can see my "Dokument" folder I want to recover the deleted files from.

If I use properties with Dolphin on "Dokument" folder I can see this info:
Location: "/media/jonas/0e362876:data"
Filesystem: "btrfs"
Mounted on: "/media/jonas/0e362876:data"
Mounted from: "/dev/md127"

I know there should be about 24GB of lost data in that folder that I want back.
And I got this folder in my computer to put the deleted files on
name: "nas_tmp"
Location: "/media/jonas/M.2 - DCS World"
Mounted on: "/media/jonas/M.2 - DCS World"
Mounted from: "/dev/nvmeOn1p6"

My question: how can I use and what should I type in Terminal to get back deleted files from my "Dokument" folder?


If we first try out extundelete?

A big big thanks to you who will help me to recover my deleted files and folders that I want back.

 

[Alexzee]

To launch the program extundelete just type extundelete in the terminal.

Here's how to use the program:

extundelete: An ext3 and ext4 file undeletion utility

extundelete is an open source utility to undelete files from an ext3 or ext4 partition.

extundelete.sourceforge.net

Here are some examples:

LinuxOPsys: Linux How-to guide, Tutorials & Tips

LinuxOPsys is a Linux blog website that publishes how-to guide, tutorials & tips about server adminstration, installation, commands, and security.

linoxide.com

 

[LorenDB]

That probably won't work since the FS in question is BTRFS.

How to undelete files on btrfs partition?

How do I undelete (recover) a deleted file on a btrfs partition? I have not taken a snapshot yet, so I can't use that feature. I know there are some tools for other Linux file systems, but google...

superuser.com

Btrfs Undelete File

I would like to undelete a large file I deleted using the rm -r command on the directory it was located in. The file was on a 1TB usb external harddisk. Nothing was written to the disk after the fi...

superuser.com

Recover your files from Btrfs snapshots - Fedora Magazine

Learn how you can use subvolumes and recover files from btrfs snapshots for added security on top of your backups of your Fedora system.

fedoramagazine.org

Just do your own search for "btrfs undelete files" if this isn't enough.

 

[Alexzee]

Does RAID use btrfs?