HP 8829 (LA), 6831 (LA), 6738 (US), 8822 (LA) Seek time, Start/stop times, Power specifications

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U Series 5 Family Product Manual, Rev. B

7

1.5 Seek time

Seek measurements are taken with nominal power at 25°C ambient temperature. All times are measured using drive diagnostics. The spec- ifications 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.

•Full-stroke seek time is one-half the time needed to seek from the first data cylinder to the maximum data cylinder and back to the first data cylinder. The full-stroke typical value is determined by averaging 100 full-stroke seeks in both directions.

Typical seek times (msec)

Read

Write

 

 

 

 

 

 

Track-to-track

1.2

2.0

 

 

 

Average

9.9

10.9

 

 

 

Full-stroke

22.0

24.0

 

 

 

Average latency: 5.55 msec

—

—

 

 

 

Note. These drives are designed to consistently meet the seek times rep- resented in this manual. Physical seeks, regardless of mode (such as track-to-track and average) are expected to meet or exceed the noted values. However, due to the manner in which these drives are format- ted, benchmark tests that include command overhead or measure logical seeks may produce results that vary from these specifications.

1.6 Start/stop times

Power-on to Ready (sec)

10 (typical)

Standby to Ready (sec)

10 (typical)

Ready to spindle stop (sec)

10 (typical)

1.7 Power specifications

The drive receives DC power (+5V or +12V) through a four-pin standard drive power connector.

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Contents Series 5 Family Series 5 Family Page Contents Configuring and mounting the drive ATA interfaceFigures Series 5 Family Product Manual, Rev. B Introduction Specification summary table ST340823A ST330621A Wet bulb tempera Ture C max Formatted capacity Default logical geometryLBA Mode Recording and interface technology Physical characteristicsPhysical organization Start/stop times Power specificationsSeek time Power consumption Conducted noise Power Mode Typical Watts Typical Amps RMS 12VTypical current profile Active mode Power-management modesPower Modes Heads Spindle Buffer Idle modeSleep mode Environmental tolerances Ambient temperatureTemperature gradient Idle and Standby timersAltitude 3.2 Wet bulb temperature3.1 Relative Humidity ShockNonoperating vibration Drive acousticsElectromagnetic immunity ReliabilityKorean RRL Agency certification Safety certificationElectromagnetic compatibility FCC verification Australian C-Tick N176Configuring and mounting the drive Handling and static-discharge precautionsOptions jumper block Jumper settings Master/slave configurationDrive as master with a non-ATA-compatible slave Ultra ATA/100 cable Cable-select optionAlternate capacity jumper Mounting dimensions-top, side and end view Drive mountingATA interface signals and connector pins ATA interfaceO pins and supported ATA signals Supported ATA commands Command name Command code in hex ATA-standard commandsATA-standard power-management commands Identify Drive commandCommand name ATA-standard security commandsWord Description 0C5AHWord Description Value Xx07HXx3FH Description if bit is set to Bit Word Bit WordSet Features command 4 S.M.A.R.T. commands 0CHCode in Features A.R.T. Command Register Page
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6738 (US), 8829 (LA), 8822 (LA), 6831 (LA) specifications

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