RK04's

Al Kossow aek at bitsavers.org
Wed Aug 10 09:30:21 CDT 2005


Oops, now that my memory is returning, the RK02 was the same geometry
but half-density.  RK02 carts say "1100BPI", RK05 carts say "2200BPI".

Was there a RK04?

==

page 1-1 of the RK11-C manual  (RK11-C_manual1971.pdf)

"The high-density option provides a choice of either
  the RK03 Diablo Disk Drive Unit or the RK05 DECpack
  Unit, both utilizing the RK03-KA, IBM Type 2315 12
  sector high-density disk cartridge. The low-density
  option provides a choice of either the RK02 Diablo
  Disk Drive Unit or the RK04 DECKpack Unit, both
  utilizing the RK02-KA IBM Type 2315 12-sector low
  density disk cartridge".

  low density is 12 256 byte sectors  (1100 bpi)
  high density is 12 512 byte sectors (2200 bpi)

  both are 203 cyls, 2 tracks.

  I can't imagine there were many RK04's made..






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