Seagate ST9500431SS manual Physical/electrical specifications, PowerChoiceTM power management

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7.0Physical/electrical specifications

This section provides information relating to the physical and electrical characteristics of the drive.

7.1PowerChoiceTM power management

Drives using the load/unload architecture provide programmable power management to tailor systems for per- formance and greater energy efficiency.

The table below lists the supported PowerChoice modes. The further you go down in the table, the more power savings you get. For example, Idle2 mode results in greater power savings than Idle1 mode. Standby mode results in the greatest power savings.

PowerChoice modes

Mode	Description

Idle_A	Reduced electronics

Idle_B	Heads unloaded. Disks spinning at full RPM

Idle_C	Heads unloaded. Disks spinning at reduced RPM

Standby_Y	Heads unloaded. Disks spinning at reduced RPM.
	Recovery requires the NOTIFY (Enable Spinup) command.

Standby_Z	Heads unloaded. Motor stopped (disks not spinning)
	Recovery requires the NOTIFY (Enable Spinup) command.

PowerChoiceTM can be invoked using one of these two methods:

•Power Condition mode page method—Enable and initialize the idle condition timers and/or the standby con- dition timers. The timer values are based on the values set in the Power Condition mode page.

•START STOP UNIT command method—Use the START STOP UNIT command (OPERATION CODE 1Bh). This allows the host to directly transition the drive to any supported PowerChoice mode.

If both the Power Condition mode page and START STOP UNIT command methods are used, the START STOP UNIT command request takes precedence over the Power Condition mode page power control and may disable the idle condition and standby condition timers. The REQUEST SENSE command reports the current PowerChoice state if active and also the method by which the drive entered the PowerChoice state.

When the drive receives a command, all power condition timers are suspended if they were enabled via the Power Condition mode page. Once all outstanding commands are processed, the power condition timers are reinitialized to the values defined in the Power Condition mode page.

Constellation SAS Product Manual, Rev. E

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Contents ST9500432SS ST9500430SSST9500431SSStandard Model Self-Encrypting Drive Model SED Fips 140-2 ModelRevision history Contents Installation Defect and error managementAbout Fips About self-encrypting drives Interface requirementsPower Constellation SAS Product Manual, Rev. E GB model current profiles List of FiguresConstellation SAS Product Manual, Rev. E Seagate Online Support and Services Seagate Technology support servicesScope Standards Applicable standards and reference documentationElectromagnetic compatibility Electromagnetic susceptibilityElectromagnetic compliance for the European Union Electromagnetic complianceAustralian C-Tick Korean KCCEuropean Union Restriction of Hazardous Substances RoHS Reference documentsGeneral description Media description Standard featuresReliability PerformanceFormatted capacities Programmable drive capacityFactory-installed options Internal drive characteristics Performance characteristicsSeek performance characteristics Access timeStart/stop time General performance characteristicsCache operation Prefetch/multi-segmented cache controlPrefetch operation Caching write dataError rates Reliability specificationsRecoverable Errors Unrecoverable ErrorsSeek errors Reliability and serviceInterface errors Preventive maintenanceControlling S.M.A.R.T 4 S.M.A.R.TPerformance impact Reporting controlThermal monitor Temperature Log Page 0Dh Parameter Code DescriptionPredictive failures Drive Self Test DST State of the drive prior to testing DST failure definition ImplementationShort test Function Code 001b Short and extended testsExtended test Function Code 010b Log page entriesProduct repair and return information Product warrantyShipping PowerChoice modes Physical/electrical specificationsPowerChoiceTM power management DC power requirements AC power requirementsPage Conducted noise immunity General DC power requirement notesPower sequencing GB model current profiles Current profilesST9500430SS, ST9500431SS and ST9500432SS in 3 Gbit operation Power dissipationST9500430SS, ST9500431SS and ST9500432SS in 6 Gbit operation Environmental limits Temperature a. OperatingEffective altitude sea level a. Operating Relative humidityShock and vibration ShockPage Recommended mounting Corrosive environment Air cleanlinessVibration a. Operating-normal Acoustics Mounting configuration dimensions Mechanical specificationsLevel 2 security About FipsPurpose Admin SP Controlled accessAbout self-encrypting drives Data encryptionRandom number generator RNG Default passwordDrive locking Data bandsPower requirements Authenticated firmware downloadSupported commands Cryptographic eraseDrive error recovery procedures Defect and error managementDrive internal defects/errors SAS system errors Deferred Auto-Reallocation Background Media ScanMedia Pre-Scan Idle Read After Write Drive orientation InstallationAir flow CoolingGrounding Drive mountingInterface requirements SAS featuresDual port support Supported commands Scsi commands supportedSupported commands Supported commands Supported commands Constellation inquiry data Mode Sense dataInquiry data Page Mode Data Header Miscellaneous status Miscellaneous operating features and conditionsMiscellaneous features SAS physical interface Datum B Section C C Section a a Connector requirements Physical characteristicsElectrical description Pin descriptionsPower Signal characteristicsSAS transmitters and receivers Ready LED OutLED drive signal SAS-2 Specification ComplianceDifferential signals General interface characteristicsConstellation SAS Product Manual, Rev. E Numerics IndexKCC Msid Mtbf See also cooling Page Constellation SAS Product Manual, Rev. E Page Seagate Technology LLC