Seek Time; Start / Stop Times - Seagate ST9750423AS Product Manual

2.7 S
EEK TIME
Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The
specifications in the table below are defined as follows:
• 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 5000 measurements of seeks between random tracks,
less overhead.
Table 2 Typical seek times
T ( )
YPICAL SEEK TIMES MS
Track-to-track
Average
Full-stroke (ST9750423AS, ST9750423ASG, ST9640424AS,
ST9640423AS and ST9640423ASG models only)
Full-stroke (all other models)
Average latency (ST9750423AS, ST9750423ASG, ST9640424AS,
ST9640423AS and ST9640423ASG models only)
Average latency (all other models)
Note. These drives are designed to consistently meet the seek times represented in this manual. Physical seeks,
regardless of mode (such as track-to-track and average), are expected to meet the noted values. However, due
to the manner in which these drives are formatted, benchmark tests that include command overhead or measure
logical seeks may produce results that vary from these specifications.
2.8 S /
TART STOP TIMES
T
IME TO READY
Power-on to Ready (sec)
Standby to Ready (sec)
M P M
OMENTUS RODUCT ANUAL
ST9750423AS, ST9750423ASG,
ST9640424AS, ST9640423AS
ST9640423ASG,
AND
T M @ 25°C
YPICAL AX
3.6 5.1
2.5 4.0
, R . F
EV
R
EAD
1.5
11.0
27.0
22.0
5.6
4.2
ST9750422AS, ST9750420AS,
ST9750420ASG, ST9500424AS,
ST9500423AS ST9500423ASG
AND
T M
YPICAL AX
4.0 5.5
3.0 4.5
@ 25°C
8