Andy wrote:
By "RLL" I assume you mean RLL 2,7 (at least
2 transitions in every 7 bit
times) - the one that gave about 50% greater capacity than MFM on "the
same"
drives.
"MFM" is technically RLL 1,2 (ISTR)
There was also a controller whose name escapes me that used RLL 3,9 to get
90% greater capacity.
RLL 1,7 is also common.