Re: Where did CKD disks come from?

According to EricP  <ThatWouldBeTelling@thevillage.com>:

Any idea who invented CKD?  The Pugh et al history book says a lot about
disk hardware but nothing about software or CKD.  Someone must have invented
it but who?  When?

>
It's the 2841 Storage Control Unit that actually creates the CKD records.
The manual referenced below says that it does CKD on a 2311 disk and
2302 disk, but also a 2321 Data Cell Drive and a 7320 Drum drive.

Ah, I hadn't realized that.  I see the 2314 had its own storage control
and probably later CKD devices.

BTW if you want to see a weird piece of storage hardware,
take a gander at the chapter on 2321 Data Cell Drive.
It has a rotating drum with cards in slots that move up and down
to be read, kind of like the old slide projectors,
and each card has 10 magnetic stripes with 200 storage locations.

Never saw one but I heard they didn't work very well and had a tendency
to crimp the tape strips when putting them away.
--
Regards,
John Levine, johnl@taugh.com, Primary Perpetrator of "The Internet for Dummies",
Please consider the environment before reading this e-mail. https://jl.ly