Anyone know the recommended firmware for this drive?

  1. Get EEPROM Utility & Flash Utility
  2. Use EEPROM Utility to change your drive to 20A1P/S
  3. Get a 20A1P/S FB EOS EOHT firmware and flash it with Flash Utility

(you can also try 20A4P 9P57 FB EOS EOHT firmware on your drive)

Thank you Skylon. I will try this now.

Followed the steps but the firmware still shows DH-16A1S HA11 even after reboot.

During the flash I noticed that it flashed quickly indicating perhaps the flash did not finish but I reflashed several times with same results.