The most common type of hard drive for most of the 1980s was called MFM. At least that’s what we commonly call them today. That was to distinguish them from a similar type we called RLL. How much difference there was between the two was always a bit controversial. But let’s look at MFM vs RLL hard drives.

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.










