@tubetimeus trying to figure out the format of an RLL disk he received prompted me to start working
on a project i've wanted to do for a while; to collect transition samples from a bunch of PC controllers
as an archival reference. I have a few samples up now under http://bitsavers.org/projects/hd_samples
When Eric and I were digging around on the web, we discovered there is really very little out there on
what the actual RLL format is on RLL-formatted drives, PC or otherwise.