Download VAX 4000 (Model 300) Technical Information Guide

2.2.16 RRD42 Optical Compact-Disc Subsystem
The RRD42 is a 600-Mbyte optical CD reader that retrieves data in fixedlength blocks from removable compact-disc media.
Functional Information
Interface
SCSI-2, single-ended, asynchronous
To Q-bus systems through KZQSA storage adapter
Ordering Information
RRD42–AA
RRD42–DA
Embedded disc drive with controller
Tabletop model, with power supply
Performance
Seek time, average
Seek time, max full stroke
Rotational speed, innermost track
Rotational speed, outermost track
Start time/Stop time
Transfer rate, sustained
Transfer rate, burst
400 millisecond, (typical)
800 millisecend, (typical)
530 rpm
200 rpm
2.0 second (max)
150 Kbytes/second
1.50 Mbytes/second (max)
Physical Specifications
Height
Width
Depth
Weight
–AA
–DA
4.15 cm (1.62 in)
14.60 cm (5.75 in)
20.80 cm (8.0 in)
1.30 kg (2.8 lb)
2.9 kg (6.30 lb)
Configuration Information
Form factor
Standard 5.25-in high, full rack width
Related Documentation
EK–RRD42–OM
RRD42 Disc Drive Owner’s Manual
2–20 VAX 4000 Model 300 Technical Information