Pleas ID this IBM system....

Paul Koning paulkoning at
Tue Apr 9 08:30:34 CDT 2019

> On Apr 8, 2019, at 9:40 PM, Jon Elson via cctalk <cctalk at> wrote:
> On 04/08/2019 06:10 PM, Tom Gardner via cctalk wrote:
>> FWIW the tape drive is an IBM 2315 announced April 16, 1965 <>  for use on low end S/360s.  Here is a brochure <>  as well as manuals at
> So, is that a capstan and pinch roller drive?  I'd kind of guess so, if announced in 1965.

I don't think other companies followed that strange design approach even back then, though.  Never mind the pinch roller part; I could never understand why IBM would build vacuum columns with the oxide facing out, sliding against the vacuum column side walls.

> (for future readers, 2315 is apparently a typo, 2415 would fit in with 24xx models being tape drives, 23xx was for disks.)

Yes, 2315 is the RK05 lookalike found in the 360 model 44.


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