You might look into one of these: TestDisk and other applications described here: https://www.digitalocean.com/community/tutorials/top-best-linux-data-recovery-

You might look into one of these: TestDisk and other applications described here: https://www.digitalocean.com/community/tutorials/top-best-linux-data-recovery-tools https://www.digitalocean.com/community/tutorials/top-best-li... And there are (CD or USB stick) bootable distros for recovering disks in bricked computers or just copying the data off the main HD to make a recovery disk. https://www.techradar.com/best/best-linux-repair-and-rescue-distros https://www.techradar.com/best/best-linux-repair-and-rescue-... I recall using TestDisk above and SystemRescueCD.