I bought a couple 10TB ALE600's awhile ago, and because i was unaware of the P3 pin issue, one refused to spin up. During that time i researched and there are working controller boards for these for sale. I tried switching the controller board between the drives, before realizing it was just the P3 issue.
Switching the boards is dead easy because they are completely sealed due to being helium filled, the boards connect to the internals via surface mounted contact pins, there are no wires to detach etc.
But since the actual mechanical drive is exactly the same, i'd bet you could actually convert these SAS drives into SATA drives by switching controllers, maybe flash new firmware and reformatting to different sector sizes etc. I have no insight on this, but could be an interesting project.
There are thousands of controller boards for sale, i can't remember the reason, something about cloud storage vendors for some reasons end up with thousands of working controllers that they dump on Ebay due to EOL liability issues when they rotate the drives, or something.
Example:
HDD PCB Board number: 006-0A90561 HGST HUH72101ALE Hard Disk Circuit Board | eBay
Addition: Come to think about it, we know there's been thousands of these sold as 'refurbished' in recent years, and it just might be they are actually cloud storage provider dumped drives without controller boards, which have then been fitted with replacement controller PCB's.
I read somewhere that during the data erasing process when cloud providers rotate out and discard these drives to 3rd party resellers, they have to remove the original controller PCB's due to data security issues, so nobody can analyse the error collecting logs etc to find patterns that corresponds to what certain databases etc leave behind. Then using those patterns to try to identify certain regions on the plattern surfaces and possibly be able to extract the previous state of the microscopic magnetic particles on that region, and then be able to sufficiently recreate the overwritten sensitive data. Spy agencies don't need to recreate all the data, just enough to be able to fill in the rest using deductive analysis.
Addition 2: some info from one Ebay seller:
PCB 0j43690 ba5184 _ 006-0a90443 HGST Hitachi HDD SATA Logic Board Elektronik | eBay
So in theory, use the ROM IC from the SAS drive with this board, and you should have a working SATA drive.
Addition 3:
This seller actually points out the location of the ROM IC here:
006 0a90446 0j43734 ba5239b WD HGST SATA 3.5" HDD PCB Logic Board | eBay
Another issue is many of the boards are sold from Kiyv, Ukraine..