How to recover files from zfs?

Question

ZFS

Hello, a friend had such a nuisance
1. I made FreeNAS where I connected the iSCSI disk
2. I uploaded data there
3. I deleted the partition
4. I made a new partition
......
5. Profit The
question is, how can I restore the data that was on the old partition when provided that no one else did anything with the disc (didn’t write, didn’t read, etc.)
Thank you

Answer 1

In general, the situation is as follows
- I took a disk image through dd
- then testdisk went through the file through Deep Search (in some cases it helps and you can do undelete there)
- if it doesn’t help, then from the same PhotoRec author (if files of certain formats) can also bite (in my case it was csv files) so there were no specific file start marks.
- In the end, I got a list of tags that are used in csv-shki and, using these tags, I bit out the data from the raw file through the command:
where MT_no. - the beginning of the necessary information in the file, and \x00 - the zero byte with which I determine the end of the necessary information

Answer 2

Good afternoon comrades!
There is such a task: Restore a file after deletion from the pool in FreeNAS (ZFS)
Initial data: Server of 6 stacks in RAID 10. Total volume is more than 10Tb
The following software was tried:
1) Testdisk
2) R-studio
3) extundelete
4) Foremost
5 ) UFS Explorer Pro
The second found VHD files, but they were all corrupted and not the correct size. Suggest options for data recovery. VHD files are prioritized.
Sincerely, Pulut!