RK05 packs

Al Kossow aek at bitsavers.org
Wed Sep 7 16:04:08 CDT 2016

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

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