Performance Specifications; Access Time Definition And Timing; Functional Specifications - Seagate ST251N Product Manual

1.2 PERFORMANCE SPECIFICATIONS
1.3 ACCESS TIME DEFINITION AND TIMING
Access time is defined as the time from the leading edge of the first
step pulse received to Seek Complete (including settling). All seek
times are true statistical averages and are calculated with a step pulse
period of 10 µsec. at nominal power and temperature.
Track-to-Track:
Average:
Full-Stroke:
Average Latency:
8 msec. max.
40 msec. max.
95 msec. max.
8.33 msec.
1.4 FUNCTIONAL SPECIFICATIONS
Tracks:
Cylinders:
Read/Write Heads:
Discs:
Rotational Speed:
Recording Method:
Recording Density (BPI):
Track Density (FCI):
Track Density:
Interface:
110 Data Transfer Rate:
Int. Data Transfer Rate:
Nonrecoverable Read Errors:
1-2
ST251N ST277N
3,272 4,908
820 (0-819) 820 (0-819)
4
2
3,600 ±0.5%
RLL(2,7)
14,902
9,935
777
SCSI
6
3
Up to 1.2 Mbits/sec.
Up to 7.5 Mbits/sec.
1 per 10
12
bits read
ST251Nl277N Product Manual, Rev. B