Replacing drives on classic systems was Wild-hair floppy drive question

When replacing drives in classic systems there are some things to keep in mind: Newer drives are mainly compatible but not 100%. Today we can go to the local store buy a drive (floppy to hard drive) plug it in and expect it to just work. Things have changed. To install a drive in a classic computer it is easiest with documentation. With newer drives study the use of "modified" pins on 34 pin connector (2, 10, 12, 14, 16, and 34 especially). I have some useful information on disks and disk drives on my website. Pin 2 - 8" drives low to reduce write current for some tracks (but not all) - PC drives high to reduce write current for the entire drive and optionally change rotational speed. Pin 10 - Classic 5.25" DS0 - PC motor on for drive A on controller side, unused on drive side (part of cable twist). Pin 12 - Classic 5.25" DS1 - PC DS for drive A (part of twist). Pin 14 - Classic 5.25" DS2 - PC DS for drive B (part of twist). Pin 16 - Classic 5.25" Motor on - PC motor on for drive B for controller always motor on for drive (part of cable twist). Pin 34 - Sometimes ready sometimes disk change, either verify or cut. There are lots of other options to take into account all I can say is don't expect to add a drive to a classic system and expect it to just work. Often it takes a lot of head scratching and reading. Please note I did not mention that there are lots of jumperable optoins on many systems. Randy www.s100-manuals.com