Seagate ST960818SM, ST980818AM, ST980817SM, ST980818SM manual Physical characteristics, Seek time

2.6Physical characteristics

		PATA		SATA
Height	(mm)	9.5 +/–0.2		9.5 +/–0.2
	(inches)	0.374	+/–0.008	0.374	+/–0.008
Width	(mm)	69.85	+/–0.25	69.85	+/–0.25
	(inches)	2.750	+/–0.010	2.750	+/–0.010
Length	(mm)	100.2	+/–0.25	100.5	+/- 1.58
	(inches)	3.945	+/–0.010	3.957	+/- 0.062
Maximum weight	(grams)	102		102
	(pounds)	0.22		0.22

2.7Seek time

Seek measurements are taken with nominal power. All times are measured using drive diagnostics. The spec- ifications 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 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 formatted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these speci- fications.

	Read (all temperatures)			Write (all temperatures)
		msec			msec
	Typical		Max	Typical		Max
Track-to-track	0.7		1	1		2
Average	13		14	14		15
Full-stroke	23		24	25		27
Average latency	5.6			5.6

14 EE25.2 Series Product Manual, Rev. E