U10 Family Product Manual, Rev. A

7

1.5 Seek 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 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 typical value is determined by averaging 100 full-stroke seeks in both directions.

Typical seek times (msec)

Read

Write

 

 

 

 

 

 

Track-to-track

1.5

2.1

 

 

 

Average

10.5

11.5

 

 

 

Full-stroke

23.0

25.0

 

 

 

Average latency: 5.56 msec

—

—

 

 

 

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 format- ted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.

1.6 Start/stop times

Power-on to Ready (sec)

10 (typical)

Standby to Ready (sec)

10 (typical)

Ready to spindle stop (sec)

10 (typical)

1.7 Power specifications

The drive receives DC power (+5V or +12V) through a four-pin standard drive power connector.