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ST9655 Family Product Manual, Rev. A
• Track-to-track seek time is an average of all possible single-track
seeks in both directions.
• Average seek time is a true statistical random average of at least 5,000
measurements of seeks between random tracks, less overhead.
• Full-stroke seek time is one-half the time needed to seek from the first
data cylinder to the maximum data cylinder and back to the first data
cylinder. The full-stroke average is determined by measuring 100
full-stroke seeks in both directions.
Seek type
Track-to-track
Average
Full-stroke
Average latency (msec): 7.54 msec
1.8 Start times
Power-on to Ready (sec)
Standby to Ready (sec)
1.9 Reliability
Nonrecoverable read errors
Mean time between failures
Contact start-stop cycles
Preventive maintenance
Mean time to repair
Typical read
Typical write
(msec)
(msec)
6
7
16
20
26
28
7 typical
(responds to selection and status
commands within 2 seconds of power-
up)
3 typical
13
1 per 10
bits read
(with retries enabled)
300,000 power-on hours
(nominal power, at sea level,
25°C ambient temperature)
50,000 cycles
(60 contact starts per hour max., with a
50% power-on duty cycle and nominal
power, at sea level, at ambient
temperature and relative humidity)
None required
10 minutes
3
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