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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