Debug was not an issue with megabyte drives, but for gigabyte and terabyte drives,.....
My early hard drives were half-height 5-1/4" 20MB MFMs, with an ISA controller card of course. By 1989 I had a 100MB drive. But it wasn't until around 1991 that I bought a 500MB full-height SCSI drive (Avid), my first drive that didn't come with a bad-sector map on a piece of paper.
That 1/2-GB drive cost me $1600 in 1991 dollars.