Barracuda 7200.7 Product Manual, Rev. E 7
2.7 Seek time
Seek measurements are taken with nominal power at 25°C ambient temperatur e. All times are measured using
drive diagnostics. The specifications in the table below are def ined as follows:
• Track-to-track seek time is an average of all possible sing le-track seeks in both directions.
• Average seek time is a true statistical random average of at least 5,000 measur ements of seeks betwee n
random tracks, less overhead.
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 times2.9 Power specifications
The drive receives DC power (+5V or +12V) through a four-pin standar d drive power connector.
Typical seek times (msec) Read Write
Track-to-track <1.0 <1.2
Average 8.5 9.5
Average latency: 4.16 4.16
Power-on to Ready (sec) 10 (max)
Standby to Ready (sec) 10 (max)
Ready to spindle stop (sec) 20 (max)