Seagate ST9160316AS manual Recording and interface technology, Physical characteristics, Seek time

3.5Recording and interface technology

Interface	Serial ATA (SATA)
Recording method	Perpendicular
Recording density BPI (bits/in avg)	1560k
Track density TPI (tracks/in avg)	325k
Areal density (Gb/in2 avg)	507
Spindle speed (RPM) (± 0.2%)	5400
Maximum Internal transfer rate (Mb/s)	1175
I/O data-transfer rate (MB/s max)	300
Interleave	1:1
Cache buffer	8MB (8192KB)

3.6Physical characteristics

Drive specification
Height	(mm)	9.5 +/-0.2
	(in)	0.374	+/-0.008
Width	(mm)	69.85	+/-0.25
	(in)	2.75 +/-0.010
Length	(mm)	100.35 +0.20 / -0.25
	(in)	3.951	+0.008 / -0.010
Weight (max)		<100 g
		0.220 lb

3.7Seek 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 5000 measurements of seeks between random tracks, less overhead.

Table 3: Typical seek times

Seek times (ms)	Read
Track-to-track (typical)	1.5
Average (typical)	13.0
Full-stroke (max)	27.0
Average latency	5.2

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.

Momentus Product Manual, Rev. D 9