Seagate ST340215AS, ST3120215AS, ST3120815AS, ST3160815AS, ST3160215AS Seek time, Start/stop times

2.6Seek 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.

	750 - 300 GB models*, ST3250620AS,		ST3250410AS and ST3250310AS*
	ST3250820AS and 200 GB model		and 160 - 40 GB models**
Typical seek times (msec)	Read	Write	Read	Write
Track-to-track	<0.8	<1.0	<0.8	<1.0
Average	<8.5	<10.0	<11.0	<12.0
Average latency:	4.16

*Measured in performance mode. **Measured in quiet mode.

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 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.

2.7Start/stop times

	750 - 320 GB	300 GB model	ST3250410AS, ST3250310AS
	models	ST3250620AS, ST3250820AS	and 160 - 40 GB models
		and 200 GB model
Power-on to Ready (sec)	15 (max)	11 (max)	7.9 (max)
Standby to Ready (sec)	15 (max)	11 (max)	7.9 (max)
Ready to spindle stop (sec)	10 (max)

Barracuda 7200.10 Serial ATA Product Manual, Rev. K 29