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8
2.7
Seek time
Seek measurements are taken with nominal power at 25°C ambient temper-
ature. 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 5,000
measurements of seeks between random tracks, less overhead.
Typical seek times (msec)
Average
Track-to-track
Read/write
Full stroke
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 or exceed 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
Start/stop times
Power-on to Ready (sec)
Standby to Ready (sec)
Ready to spindle stop (sec)
2.9
Power specifications
The drive receives DC power (+5V or +12V) through a four-pin standard drive
power connector.
Barracuda 5400.1 Product Manual, Rev. A
ST320015A
Read
Write
12.0
13.0
0.3
0.7
13.0
16.0
22
23
6.5 (max)
6.0 (typical)
10 (typical)
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