Seagate ST4000VM000 manual Physical characteristics, Seek time, Start/stop times

Drive Specifications www.seagate.com

2.5Physical characteristics

Maximum height
2TB model	26.1mm / 1.028 in
1TB model	20.20mm / 0.795 in
Maximum width	101.6mm / 4.0 in (± 0.010 in)
Maximum length	147.00mm / 5.78 in
Typical weight
2TB model	535g	/ 1.18 lb
1TB model	415g	/ 0.915 lb
Cache buffer	64MB (65,536kb)

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 5000 measurements of seeks between random tracks, less overhead.

		2TB			1TB
Typical seek times (ms)	Read		Write	Read		Write
Track-to-track	<1.0		<1.2	<1.0		<1.2
Average	<8.5		<9.0	<8.5		<9.0
Average latency	5.1		5.1	5.1		5.1

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.

Note 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.

2.7 Start/stop times

Start/stop times @ 25°C	2TB model	1TB model
Power-on to ready (max)	<17.0s	< 6.0s
Standby to ready (max)	<17.0s	< 6.0s
Ready to spindle stop (max)	10.0s	10.0s

14 Video 3.5 HDD Product Manual, Rev. H