I really can't help any further - my only suggestion would be to try an alternate SCSI device.
If you can boot from floppy then you could try a SCSI zip drive if you can get hold of one. Using the 'susie.x' utility you can map zip/mo/CDROM drives as normal drives on the x68000:
https://www.target-earth.net/wiki/doku.php?id … x68_scsi_drives
FAT16 partitions seem to work fine, but FAT32 is not supported by Human68k dos.
Ah, now hold on, this is one of those new combined memory + midi cards, yes? I suspect you are better off talking to the designer; all of my testing is with an original Sharp CZ-6BM1 midi card and an XSIMM10sS memory upgrade:
https://www.target-earth.net/wiki/doku.php?id=blog:x68_super
It's entirely possible there is some conflict with th combined midi/ram card and the SCSI bus as emulated by bluescsi which is impacting the floppy data bus... I'm afraid my technical knowledge of the x68000 extends to graphics hardware access and programming, but not to the io/storage subsystem.
You best bet outside of contact with the developer of the ram/midi card is on the forums at nfg games.
My collection database and technical wiki:
https://www.target-earth.net