I acquired an HP 1630D a couple of days ago. It is a 2311A serial number prefix with the expected 01630-66512 version CPU board. It originally had the "HP1630 Software, Tue, 26 Oct 1982, 16:31" 01630-80008 - 01630-80015 version firmware 2764 EPROM set installed. That is the version with HP-IL tape storage support.
I burned a "HP1631 Software, Mon, 14 Oct 1985" 01630-80054 - 01630-80061 version firmware 27128 EPROM set and swapped those in place of the original firmware EPROMs and now have HP-IB disk storage support. The only two 1630 config/IA floppies I currently have are 10304-13012 8085 Config / Inverse Assembler 10342-13012 HP-IB, RS-232C/V.24, RS-442 Config / Inverse Assembler I used HPDir to dup the two floppies from a physical 9121D drive into .HPI image files, then verified that the 1630D can access those .HPI image files loaded into HPDrive to emulate a 9121D drive. I can send those two .HPI image files to anyone who wants them.