I don't actually know what SCSI spec the SCSI/IDE adaptor is supposed to be compliant with.

It's not one of the well-known ones, but is actually a board taken out of a Maxtor drive caddy for filling a SCSI drive shelf with IDE drives. When it arrives I'll hopefully know more from reading the silkscreening on the ASIC.

I've got hope that it's U160 or even U2W on the SCSI side, since the time period when IDE drives were cheaper than SATA was quite a long time ago indeed.

*fingers crossed*