Seagate ST3250823AS, ST3200826AS Seek time, Start/stop times, Typical seek times msec Read Write

Page 18

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 random tracks, less overhead.

*Typical seek times (msec)

Read

Write

 

 

 

Track-to-track

0.8

1.0

 

 

 

Average

<11.0

<12.0

 

 

 

Average latency:

4.16

4.16

 

 

 

*Measured in quiet mode

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.

2.7Start/stop times

Power-on to Ready (sec)

10 (max)

 

 

Standby to Ready (sec)

10 (max)

 

 

Ready to spindle stop (sec)

12 (max)

 

 

12

Barracuda 7200.8 Serial ATA Product Manual, Rev. F

Image 18
Contents Barracuda 7200.8 Serial ATA Page Contents Barracuda 7200.8 Serial ATA Product Manual, Rev. F List of Figures Page Introduction Barracuda 7200.8 Serial ATAAbout the Serial ATA interface Drive specifications Specification summary tablesDrive specifications for 400 Gbyte models Drive specification ST3400832AS ST3400632ASDrive specifications for 400 Gbyte models Drive specifications for 300 Gbyte models Drive specification ST3300831AS ST3300631ASWill be asked to provide the drive serial number, model Drive specifications for 250 and 200 Gbyte models Drive specification ST3250823AS ST3250623AS ST3200826ASTo access the following web Formatted capacity Default logical geometryLBA mode Cylinders Read/write heads Sectors per track 16,383Physical characteristics Recording and interface technologySeek time Start/stop timesTypical seek times msec Read Write Power specifications DC power requirements Typical current profilesIdle mode Power-management modesActive mode Sleep modeEnvironmental specifications Acoustics Radio frequency environments Electromagnetic immunityReliability Test Description Performance level Reference standardElectromagnetic compatibility Safety certificationAgency certification Korean RRLAustralian C-Tick N176 FCC verificationEnvironmental protection Corrosive environmentEuropean Union Restriction of Hazardous Substances RoHS Barracuda 7200.8 Serial ATA Product Manual, Rev. F Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingBarracuda 7200.8 Serial ATA Product Manual, Rev. F 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 F4H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordSet Features command Set Features command values3 S.M.A.R.T. commands M.A.R.T. commandsCode in features register A.R.T. command Barracuda 7200.8 Serial ATA Product Manual, Rev. F Internet Presales SupportTechnical Support Warranty Service Data Recovery Services Authorized Service CentersData Recovery Services Call Center Toll-free Direct dial Index Page Sata Page Page Seagate Technology LLC