Seagate ST3500514NS, ST31000524NS manual Physical characteristics, Seek time, Start/stop times

3.5	Physical characteristics
Maximum height		26.1mm (1.028 in)
Maximum width		101.6mm (4.000 +/- 0.010 in)
Maximum length		146.99mm (5.787 in)
Max weight
	ST32000644NS	710g	(1.565 lb)
	ST31000524NS	640g	(1.411 lb)
	ST3500514NS	610g	(1.345 lb)
Cache buffer		64MB (64,768KB)
	ST32000644NS
	ST31000524NS and ST3500514NS	32MB (32,768KB)

3.6Seek 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 5000 measurements of seeks between random tracks, less overhead.

*Typical seek times (ms)	Read	Write
Track-to-track	0.5	0.8
Average	<8.5	<9.5
Average latency:	4.16

*Measured in performance 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.

3.7Start/stop times

	2TB models	1TB models	500GB models
Power-on to Ready (sec)	15 (max)	10 (max)	7 (max)
Standby to Ready (sec)	15 (max)	10 (max)	7 (max)
Ready to spindle stop (sec)	20 (max)

Constellation ES Serial ATA Product Manual, Rev. D 7