Technical information

2.2.7 RA81 Disk Drive
The RA81 disk drive is a high-capacity fixed-disk drive that provides 456
Mbytes of formatted storage space. The VAX 4000 Model 200 supports these
drives in separate storage expansion enclosures only.
Storage Capacity
User capacity 456 Mbytes
User capacity (blocks) 891,070
Ordering Information
RA81–HA/–HD RA81 disk drive (120 V/240 V)
RQA81–AA RA81 disk drive (120 V) with KDA50 controller
and BC26V–06 cable
RQA81–AD RA81 disk drive (240 V) with KDA50 controller
and BC26V–6D cable
BC26V–6D Interconnect cable with connector block
Performance
Average seek time 28.00 milliseconds
Average rotational latency 8.32 milliseconds
Average access time 36.30 milliseconds
Peak transfer rate 17.4 Mbits/second
Physical Specifications
Height 26.3 cm (10.38 in)
Width 44.5 cm (17.5 in)
Depth 67.3 cm (26.5 in)
Form factor 10.5-in high, full rack width
Weight 61.2 kg (135 lb)
Related Documentation
EK–ORA81–SV RA81 Disk Drive Service Guide
EK–ORA81–UG RA81 Disk Drive User’s Guide
2–10 VAX 4000 Model 200 Technical Information