Digital Equipment RWZ52, User Manual

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Drive Characteristics
Performance Characteristics
650 MByte Disks 1.3 GByte Disks
Seek Times
Average Seek 23.5 ms 23.5 ms
Full Stroke 45 ms 45 ms
Short Seek(across 2.2 Mbyte) 5 ms 4 ms
Single track(track-to-track) 2 ms 2 ms
Average Latency 8.3 ms 12.5 ms
Average Access Time 31.8 ms 36 ms
Spindle Rotational Speed
3600 rpm 2400 rpm
Data Transfer Rates
Reads (max. sustained) 1.0 Mbytes/sec. Up to 1.6
Mbytes/sec.
Writes (max. sustained) 0.5 Mbytes/sec. Up to 0.8
Mbytes/sec.
Burst (synchronous) 5 Mbytes/sec. 5 Mbytes/sec.
Burst (asynchronous) 3 Mbytes/sec. 3 Mbytes/sec.
Buffer size 512 Kbytes 512 Kbytes
Read buffering Read aheads Read aheads
Write buffering Immediate
Reporting Write Re-
ordering Immediate
Reporting Write Re-
ordering
Read/Write Error Rate less than 1 per 1014
bytes less than 1 per 1014
bytes
Media Load/Unload Times (Autochanger)
Load (including spin up) 2.8 sec. avg. 2.3 sec. avg.
Unload (including spin down) 1.4 sec. avg. 1.4 sec. avg.
Media Load/Unload Times (Standalone)
Load (including spin up) 3.8 sec. avg. 3.3 sec. avg.
Unload (including spin down) 2.3 sec. avg. 2.3 sec. avg.
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