"intelligent" disk drives

I suppose I should mention the HP HPIB and HPIL drives, which all had intellegent controllers. The only HPIL driv I know about is the 9114. It contains an HPIL chip (1LB3 for the HP types here), a 68B09 processor, 2793 controller, and glue logic to control a Sony 3.5" floppy drive. It's battery-powered (2.5Ah lead acid pack), much of the electronics powers down when the drive is not being accessed (only the HPIL chip and RAM remain active) to save power. The 5.25" HPIB floppy drive I've seen (82901 I think) uses a 6802 processor + Fujitsu (WD-like) floppy controller chip, glue, etc. Mains powered (as are all the HPIB dries I know of), it uses a pair of HP-speced (gold-plated PCBs, etc) TM100-2 drives. The dual 3.5" HPIB drives again use a 68B09 + much the same disk controller circuit linked to a pair of the Sony full-height 3.5" drives. The combined 3.5" floppy + 5.25" winchester units (9133) come in many forms. Later ones have a combined cotnroller board with a 68B09 + WD1010 hard disk controller + floppy controller, etc. The drives are a Sony 3.5" floppy drive and a stnadard winchester drive (ST412 interface). The earlier ones are stranger, they have 2 separate disk controllers in them, simply linked to the same HPIB connector. Each has a 68B09 and the appropriate contreoller stuff. THis is where I learnt that the ST412 is actually a member of a family including the ST406 (single platter, 2 heads, 6Mbyte unformatted) and ST419 (3 platters, 6 heads, 19Mbytes unformatted) drives. I'd never heard of an ST406 before. Even later, there was the 9153 (floppy/winchester) and 9154 (winchester only) unit. Again 98B09 based, but now everything in SMD packages (the 68B09 is a PLCC package). The winchesters are HP custom units with a strange interface -- fairly high level for positioning the heads, but still the raw bit stream for reading and writing. Their cartridge tape drives also have intellegent controllers. Mostly 68x09 based, but the 9145 I have has what appears to be a 68000 inside -tony