eight bit controllers to look for:
Seagate ST-05X Xt to IDE
Seagate ST-11M MFM
Seagate ST-11R RLL
SMS/OMTI 5520 MFM
SMS/OMTI 5527 RLL
Western Digital WD XT140 IDE note: separate cables - 2 drives
Western Digital WD XT150R IDE note: 1 drive only
Western Digital WD XTGEN MFM
Western Digital WD XTGEN2 MFM best interleave I think -0 bigger capacity
Western Digital WD XTGENR RLL
Western Digital WD 1002-WX1 MFM slow interleave
Western Digital WD 1002-27X RLL slow interleave
Western Digital WD 1004-WX1 MFM better interleave bigger capacity
Western Digital WD 1004-27X RLL better interleave
Hope this helps.
Paxton