Seagate ST2000DL003 manual Recording and interface technology, Physical characteristics, Seek time

Drive Specifications www.seagate.com

2.4Recording and interface technology

Interface	Serial ATA (SATA)
Recording method	Perpendicular
Recording density (max)	1632kb/in
Track density (avg)	274 ktracks/in
Areal density (avg)	422Gb/in2
Spindle speed (RPM)	5900
Internal data transfer rate (max)	1928Mb/s
Sustained data transfer rate (max)	144MB/s
I/O data-transfer rate (max)	600MB/s

2.5Physical characteristics

Maximum height
2000GB and 1500GB models	26.1mm / 1.028 in
Maximum width	101.85mm / 4.0 in (± 0.010 in)
Maximum length	147.00mm / 5.78 in
Typical weight
2000GB and 1500GB models	635g / 1.39 lb
Cache buffer
2000 and 1500GB models	64MB

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 5,000 measurements of seeks between ran- dom tracks, less overhead.

Typical seek times (ms)	Read	Write
Track-to-track	1.0	1.2
Average	12.0	13.0
Average latency	5.08	5.08

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.

14 Barracuda Green SATA Product Manual, Rev. D