Seagate ST3750528AS, ST31000528AS Seek time, Start/stop times, Typical seek times msec Read Write

Page 18

2.5Seek 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.

Typical seek times (msec)	Read	Write

Track-to-track	1.0	1.2

Average	8.5	9.5

Average latency:	4.16

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.

2.6	Start/stop times

		1000 and 750 GB models	500, 320, 250 and 160 GB models

Power-on to Ready (typ / max sec)		<10.0	<8.5

Standby to Ready (typ / max sec)		<10.0	<8.5

Ready to spindle stop (typ / max sec)			10

12	Barracuda 7200.12 Serial ATA Product Manual, Rev. B

Image 18

Contents Barracuda 7200.12 Serial ATA Revision history Revision Date Sheets affected or commentsContents Barracuda 7200.12 Serial ATA Product Manual, Rev. B List of Figures Page Introduction About the Serial ATA interface Drive specifications Drive specifications summary for 1000 and 750 Gbyte models Will display the warranty information for your drive Drive specifications summary for 500 Gbyte models Tem will display the warranty information for your drive Drive specifications summary for 250 Gbyte models Will display the warranty information for your drive Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383Physical characteristics Recording and interface technologyTypical seek times msec Read Write Seek timeStart/stop times 750 GB models 500, 320, 250 and 160 GB modelsPower specifications Idle mode Power-management modesActive mode Sleep modeEnvironmental specifications Nonoperating shock 750 GB models ShockOperating shock 500, 320, 250 and 160 GB modelsFluid Dynamic Bearing FDB motor acoustics AcousticsElectromagnetic immunity Test for Prominent Discrete Tones PDTsAgency certification Safety certificationReliability Electromagnetic compatibilityKorean RRL Australian C-Tick N176FCC verification Environmental protection Corrosive environmentConfiguring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions 1000 and 750 GB models Drive mountingMounting dimensions 500, 320, 250 and 160 GB models Serial ATA Sata interface Hot-Plug compatibilitySignal Serial ATA device plug connector pin definitionsSerial ATA connector pin definitions Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F3H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordShall be cleared to Set Features command Set Features command values3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Seagate Technology support services Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index ITE Page Barracuda 7200.12 Serial ATA Product Manual, Rev. B Page Seagate Technology LLC