PDP11 PeripheralsHbk 1972 - Trailing-Edge

5.3.5 Specifications
Disks:
Tracks:
Words:
Word format:
Density:
Recording Method:
Words per Disk:
Total Words:
Word Transfer Rate:
Data Storage Capacity
One RF11 can control eight RS11 disks
Each RS11 has 128 data tracks.
Each data track includes 2048 data words.
Data words are recorded in 22 bits
Maximum recording density is 1900 BPI
NRZI
262,144
2,097,152
Data Transfer Rate
60-Hz Power
16.0psec
Minimum Access Time: 258psec
(read amp settling for track switching)
50-Hz Power
19.2J1sec
258J1sec
Average Access Time: 16.9ms 20.3ms
(approximately 1/2-revolution)
Maximum Access Time:
Pri ori ty Level:
Interrupt Vector Address:
Interrupt Caused by:
33.6ms 40.3ms
Priority Interrupt
BR5 (selectable by plug in circuit chip)
204
Function Complete
Error (DCS 15 Set)
Maximum Latency:
12ps: DRL (DAE7) is set and no further transfers
occur for one disk revolution.
Maximum Delay:
3 disk revolutions: MXF (DCS9) is set and operation
halts.
Environmental Requirements
Temperature (Operating): 65° to 90° F
Relative Humidity (Operating):20% to 55% relative
Condensation (Operating or none
Storage):
Vibration/Shock (Operating): Good isolation is provided. To prevent data errors,
extreme vibrations should be avoided while the
RSII is transferring information.
Power Dissipation:
Dependent on the number of disks in the system. Varies from 0.75 kW (2550
BTU/hr) for a I-disk system to 2.42 kW (8230 BTU/hr) for an 8-disk system.
Power Requirements
RSII Motor Power
Voltage: 117 /235± 10%VAC 117 VAC
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