Seagate ST9500325AS Physical characteristics, Seek time, Start/stop times, Typical seek times

2.6Physical characteristics

Drive specification
Height	(mm)	9.5 +/-0.2
	(inches)	0.374 +/-0.0079
Width	(mm)	69.85 +/-0.25
	(inches)	2.75 +/-0.0098
Length	(mm)	100.35 +0.20 / -0.25
	(inches)	3.957 +0.0079 / -0.0098
Weight (max)		98.8 grams
	ST9500325AS
	ST9500325ASG	0.218 pounds
	ST9400326AS
	ST9320325AS
	ST9320325ASG
	ST9250315AS	93.5 grams
	ST9250315ASG	0.206 pounds
	ST9160314AS
	ST9160314ASG
	ST9120315AS
	ST9120315ASG
	ST980313AS
	ST980313ASG
	ST9160301AS	105 grams
		0.23 pounds

2.7Seek 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.

Table 4: Typical seek times

Seek times (msec)	Read
Track-to-track (typical)	1
Average (typical)	14
Full-stroke (max)	30
Average latency	5.56

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.

2.8Start/stop times

Time to ready	Typical	Max @ 25°C
Power-on to Ready (sec)	3.6	3.8
Standby to Ready (sec)	1.8	2

10 Momentus 5400.6 SATA Product Manual, Rev. E