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TestDisk 7.2-WIP, Data Recovery Utility, August 2020 Christophe GRENIER <grenier@cgsecurity.org> https://www.cgsecurity.org Disk /dev/sdd - 25 TB / 22 TiB - CHS 3040005 255 63
Analyse cylinder 16972/3040004: 00% check_FAT: Unusual media descriptor (0xf0!=0xf8)
Warning: number of heads/cylinder mismatches 16 (FAT) != 255 (HD)
Warning: number of sectors per track mismatches 32 (FAT) != 63 (HD)
EFI System 40 409639 409600 [EFI System Partition] [EFI]

I followed a tutorial online, and picked efi/gpt since it was a gpt partition that got lost. It found it and it's scanning it now.
Is everything looking normal?
Also, if it is successful do I set it as Primary or Logical? In disk management it has no drive letter and wants to be formatted so I'm a little confused on what to do when I wake up and see the results of this.

Sorry if this was inappropriately posted, but desperation won out.

Thanks

Primary.

woke up to this, is it still normal?

check_FAT: Unusual media descriptor (0xf0!=0xf8)
Warning: number of heads/cylinder mismatches 16 (FAT) != 255 (HD)
Warning: number of sectors per track mismatches 32 (FAT) != 63 (HD)
EFI System 40 409639 409600 [
EFI System Partition] [EFI] Unknown 290594084 119697794276643 119697503682560 [~Q^EMM-=^[]
Unknown 830051298 499727928545 498897877248 [aM-} ~^']
check_FAT: Bad jump in FAT partition
Unknown 1604213493 2878535225 1274321733
Unknown 1742564284 466274992876475 466273250312192 [M-=s[^V~LX]
check_FAT: Bad jump in FAT partition
check_FAT: Bad jump in FAT partition
Unknown 2829898979 34913747657872610 34913744827973632 [H~[{^?$]
Unknown 3210114302 2179843683581 2176633569280
BeFS 3321829062 8444252623148741 8444249301319680 [^EnrW~U^OM- a&g^RM-l`\^^M-5M-!^S Ѵy~S M-:M-:?^check_FAT: Bad jump in FAT partition
Unknown 4454742213 7066219796 2611477584 [W~A~H~H7~W]

IF you want instant repair of your 25TB, go to a commercial service and purchase immediate treatment.

There is no such thing as "normality" in breakdown of drives. So be patient and post your full log afterwards, read the manual, cross-read everything on www.cgsecurity.org and read in this forum as well, because I feel like continuously repeating myself over and over again and I might very well be that your answer is only a few posts away.

well this should work since this happened once before and i deleted the array, rebuilt it, then formatted it in windows and ran file recovery and got everything back (it just took 6 days).
I'm hoping this simply restores the partition and everything pops back without needing to run file recorvery.
that's the only reason I was asking about the errors, since I never tried this way.

I'll post my results in about 3 days when this is done, it's at 11% now and has been running for 10 hours.