Following the recent OEM XSU1 FW find, I have noticed the following IDs based on the latest Liteon FW:
FW XSU1 016B
Based on the supposed chipset series, we would expect LTR-32125W to be 020B. So, this is not a HW ID as I had assumed. It may be FW code base ID, but it doesn’t explain the FW features for LTR-32125W. Still, the prospect of a “3” series drive with “5” series features is interesting… Someone needs to open one of those Polish/German XSU1 drives labelled as LTR-40125S to determine the HW.
Update: Earlier builds of LTR-40125S FW are also 016B. Even OEM drives from TDK, Iomega, etc share these codes… It seems to point to FW code base.