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8 Barracuda Serial ATA V Product Manual, Rev. B
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.
Note. These drives are designed to consistently meet the seek times repre-
sented 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 Start/stop times
2.9 Power specifications
The drive receives DC power (+5V or +12V) through a native SATA power
connector. See Figures 5 and 6 on page 23.
Table 2: Typical seek times
Typical seek times (msec) Read Write
Track-to-track 1.0 1.2
Average
1 disc
2 disc
9.4
9.0
10.5
10.0
Average latency: 4.16 4.16
Power-on to Ready (sec) 10 (max)
Standby to Ready (sec) 10 (max)
Ready to spindle stop (sec) 10 (max)