The RK05J Disk Drive is a removable media hard drive with a total capacity of 1.6 million 12 bit words. This was normally used with the PDP-8E type omnibus machines. It was attached to the computer with the RK8E 3 board set which transferred data using the omnibus data break. The heads are parked off the disk when the drive is shut down. The drive has a battery in it so the heads can be parked if the power fails.
|Data Transfer Rate||9.7 microsecond per word (102k words/second)|
|Average Access Time||70 millisecond|
|Sectors per track||16|
|Words per sector||256 (4096 per track)|
|Recording Method||Double Frequency NRZ|
|Tracks per inch||100|
|Recording Media||Iron oxide disk, 14 inches in diameter|
|Operating Environment||Maximum: 50 to 110 F
Interchangeable range RK05 & RK05J: 30 F
Relative Humidity: 8 to 80 %
|Cost||Drive and controller $7900 and $350 installation from DEC in 1974
74 Dollars per month for maintenance
Additional drives $5100 and $260 installation
64 Dollars per month for maintenance
Disk cartridge $99
Documents related to RK05
Thumbnail Picture Selector
Front of drive ( 45K) Bottom of drive ( 53K) Top right of drive ( 62K) Top left of drive ( 50K)
Disk pack ( 20K) Top of disk (damaged) ( 29K) Bottom of disk ( 29K) Pack case ( 24K)
Front M993B Control Cable Board ( 55K) Back M993B ( 51K) Front M993C Control Cable Board ( 59K) Back M993C ( 52K)
Videos of operation of RK05 drive. How to view The large realvideo files are the best but slow to download. The large MPEG has some artifacts from being recorded with interlaced video from a camcorder and is larger than the realvideo.
Loading pack into RK05.
Realvideo: large (746K) Small not available yet.
MPEG: MPEG not available yet.
View of heads loading.
Realvideo: large (301K)
View of heads seeking.
Realvideo: large (553K)