Seek Time; Start/Stop Times; Power Specifications - Seagate ULTRA ATA ST310212A Product Manual

U10 Family Product Manual, Rev. A

1.5 Seek time

Seek measurements are taken with nominal power at 25°C ambient
temperature. All times are measured using drive diagnostics. The spec-
ifications 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)
Track-to-track
Average
Full-stroke
Average latency: 5.56 msec
Note. These drives are designed to consistently meet the seek times rep-
resented 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)
Standby to Ready (sec)
Ready to spindle stop (sec)

1.7 Power specifications

The drive receives DC power (+5V or +12V) through a four-pin standard
drive power connector.
Read
1.5
10.5
23.0
—
10 (typical)
10 (typical)
10 (typical)
7
Write
2.1
11.5
25.0
—