Here are a couple of my RK05 drives, an RK05J and an RK05F:
I actually have another drive in rougher shape (parts drive), not pictured.
The RK05F drive has twice the capacity, but the media is not removable. Hence
the "0/1" designation in the picture. (Sometime I should probably get around to changing
drive "3" to be drive "2".)
Each RK05 unit number corresponds to 1.6Mwords of storage, organized as 203
tracks, 2 surfaces, 16 sectors/track, and a sector size of 256 12-bit words. The
transfer rate is about 20% faster than a floppy disk, at 102Kwords per second, and each unit
holds roughly 41% more than a typical PC diskette. The average access time was about
11 percent faster than a floppy.
For it's time, it was hot stuff -- the equipment
pictured sold new for about $13,000 (plus installation).
My hope is to interface these through my RK8F controller and DW8E to my large
PDP-8/i system.
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Last updated on 04/30/12 02:07
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