Hello. Thanks for reading my topic.
I have an HDD with problems in BTRFS partition as if not is possible read the superblock.
Have an utility or command to do backup copy of disk partition table and superblock of each partition and having an feature to undelete partitions ?
Have an nice week.
For partition recovery / undelete, tools like TestDisk may help.
Important: Avoid writing anything to the disk until you finish recovery attempts.
- TestDisk: https://www.cgsecurity.org/wiki/TestDisk
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You have an good heart saying to me avoid any written on disk.
Have an nice week.
I just wanted to make sure you don’t accidentally overwrite anything important 
I hope you’re able to recover your filesystem successfully.
Have a great week as well!