Seagate ST3250623NS manual Recording and interface technology, Physical characteristics, Seek time

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2.4Recording and interface technology

Interface

Serial ATA (SATA)

 

 

Recording method

16/17 EPRML

 

 

Recording density BPI (bits/inch max)

763,000

 

 

Track density TPI (tracks/inch avg)

120,000

 

 

Areal density (Mbits/inch2 avg)

91,560

Spindle speed (RPM) (± 0.2%)

7,200

 

 

Internal data transfer rate (Mbytes/sec max)

95

 

 

Sustained transfer rate OD (Mbytes/sec max)

65

 

 

I/O data-transfer rate (Mbytes/sec max)

150 (SATA 1.0)

 

 

Interleave

1:1

 

 

Cache buffer

8 Mbytes (8,192 kbytes) on ST3400832NS and

 

ST3250823NS models.

 

16 Mbytes (16,384) on ST3400632NS and

 

ST3250623NS models.

 

 

2.5Physical characteristics

Maximum height

 

(mm)

26.11

(inches)

1.028

 

 

Maximum width

 

(mm)

101.85

(inches)

4.010

 

 

Maximum length

 

(mm)

146.99

(inches)

5.787

 

 

Maximum weight

 

(grams)

635

(pounds)

1.39

 

 

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

8.0

9.0

 

 

 

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

NL35 Series SATA Product Manual, Rev. B

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Contents ST3400832NS ST3400632NS ST3250823NS ST3250623NS NL35 Series Serial ATAPage Contents NL35 Series Sata Product Manual, Rev. B List of Figures Page NL35 Series Serial ATA IntroductionAbout the Serial ATA interface Specification summary tables Drive specificationsSustained transfer rate OD Mbytes/sec Nonoperating LBA mode Default logical geometryFormatted capacity Cylinders Read/write heads Sectors per track 16,383Recording and interface technology Physical characteristicsSeek time Typical seek times msec Read WriteStart/stop times Power specificationsTypical current profiles DC power requirementsActive mode Power-management modesIdle mode Sleep modeEnvironmental specifications Acoustics Reliability Electromagnetic immunityRadio frequency environments Test Description Performance level Reference standardAgency certification Safety certificationElectromagnetic compatibility Korean RRLCorrosive environment Environmental protectionAustralian C-Tick N176 FCC verificationPage Handling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewNL35 Series Sata Product Manual, Rev. B Hot-Plug compatibility Serial ATA Sata interfaceSerial ATA connector pin definitions Serial ATA device plug connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Word Description Value Identify Device commandXx07H Bit Word Description if bit is set to Bit WordSet Features command values Set Features commandA.R.T. commands 3 S.M.A.R.T. commands3.1 S.M.A.R.T. Command Transport SCT Code in features register A.R.T. commandNL35 Series Sata Product Manual, Rev. B Internet Seagate Technology support servicesPresales Support Technical SupportData Recovery Services Authorized Service Centers Warranty ServiceData Recovery Services Call Center Toll-free Direct dial Index ITE RPM Page Page Seagate Technology LLC