On 9/7/16 11:46 AM, Paul Koning wrote:
> TPI, as in "transitions per inch"? > tracks per inch > I vaguely remember that the 1311 (20 sectors of 200 digits each per track) > used silvery colored heads. I wonder if those are the same. They were > pretty sturdy; one day when we had a hydraulic leak, the FE just cleaned > heads and pack with isopropyl alcohol, fixed the leak, and put the drive and > pack back into service. > 2311 is 100 tpi, 2314 is 200 http://s3.computerhistory.org/groups/ibm-1311-2311.pdf has a nice picture of the 2311 heads
