I ran Coherent on quite a few PC clone computers, most of them 286 with a WD1006 MFM controller and a Seagate ST-225 or Mitsubishi MR535 hard disk. Later I had it on a variety of cheap 386 boxes with IDE interfaces and on one machine with an Adaptec 1542 SCSI adapter. It never caused any issues on any of them. It was in the late 1980's to early 90's. If it was luck, I must have had a lot of it back then!