Seagate ST92014A, ST94019A Power-management modes, Power management modes, Active mode, Idle mode

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2.9.4Power-management modes

The drive provides programmable power management to provide greater energy efficiency. In most systems, you can control power management through the system setup program. The drive features the following power-management modes:

Table 3:

Power management modes

 

 

 

 

 

 

 

Power modes

Heads

 

Spindle

Buffer

 

 

 

 

 

Active (operating)

Tracking

 

Rotating

Enabled

 

 

 

 

 

Idle, performance

Tracking

 

Rotating

Enabled

 

 

 

 

 

 

Idle, active

 

Floating

 

Rotating

Disabled

 

 

 

 

 

Idle, low power

Parked

 

Rotating

Disabled

 

 

 

 

 

 

Standby

 

Parked

 

Stopped

Disabled

 

 

 

 

 

 

Sleep

 

Parked

 

Stopped

Disabled

 

 

 

 

 

 

•Active mode

The drive is in Active mode during the read/write and seek operations.

•Idle mode

The buffer remains enabled, and the drive accepts all commands and returns to Active mode any time disc access is necessary.

•Standby mode

The drive enters Standby mode when the host sends a Standby Immediate command. If the host has set the standby timer, the drive can also enter Standby mode automatically after the drive has been inactive for a specifiable length of time. The standby timer delay is established using a Standby or Idle command. In Standby mode, the drive buffer is enabled, the heads are parked and the spindle is at rest. The drive accepts all commands and returns to Active mode any time disc access is necessary.

•Sleep mode

The drive enters Sleep mode after receiving a Sleep command from the host. In Sleep mode, the drive buffer is disabled, the heads are parked and the spindle is at rest. The drive leaves Sleep mode after it receives a Hard Reset or Soft Reset from the host. After receiving a reset, the drive exits Sleep mode and enters Standby mode with all current translation parameters intact.

•Idle and Standby timers

Each time the drive performs an Active function (read, write or seek), the standby timer is reinitialized and begins counting down from its specified delay times to zero. If the standby timer reaches zero before any drive activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive accepts all commands and returns to Active mode when disc access is necessary.

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Momentus 42 Product Manual, Rev. A

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Contents Momentus Page Momentus Page Revision Date Sheets Affected Revision status summary sheetRev. a 05/03/2004 All Page Contents Momentus 42 Product Manual, Rev. a List of Figures Viii Momentus 42 Product Manual, Rev. a Introduction Momentus 42 disc driveMomentus 42 Product Manual, Rev. a Drive specifications Specification summarySpecifications Drive specification ST94019A ST93015A ST92014ASpecifications Default logical geometry LBA modeFormatted capacity Physical organizationRecording and interface technology Physical characteristicsTechnology Specification Seek time Time to readyTypical seek times msec Read Write Time to ready Typical MaxPower specifications Voltage tolerance Typical current profileConducted noise Power-management modes Power management modesActive mode Idle modeEnvironmental specifications Shock Operating shockNonoperating shock VibrationAcoustics Electromagnetic immunityDrive level acoustics Electromagnetic immunitySafety certification Measurement type SpecificationReliability Agency certificationFCC verification Korean RRLAustralian C-Tick N176 Momentus 42 Product Manual, Rev. a Configuring and mounting the drive Handling and static discharge precautionsJumper settings Master/slave configurationDrive mounting Cable-select optionATA interface signals and connector pins Connector signalsConnector Cable Signal Name Contact Conductor Cable Connector Conductor Contact Signal NameCommand name Command code in hex ATA-standard commands Supported ATA commandsSupported commands ATA-standard security commands Command name Command code in hexATA-standard power-management commands Identify Device command Word Description ValueXxxxH Description if bit is set to Bit Set Features command Features register valuesCode in features register A.R.T. command 4 S.M.A.R.T. commandsSupported S.M.A.R.T. commands Seagate Technology support services Internet MySeagate Reseller.seagate.comPresales Support Technical SupportWarranty Service Authorized Service CentersCall Center Toll-free Direct dial Americas +1-405-324-47301 +1-405-324-4704Americas SEAGATE2 +1-405-324-47003 +1-405-324-4702 Call Center Toll-free Direct dial FAX / InternetToll-Free Support Numbers FAX Services-All Europe toll callCall Center Presales and Technical Support Warranty Service Asia/Pacific Support Services Momentus 42 Product Manual, Rev. a Index NumericsPage Page Momentus 42 Product Manual, Rev. a Page Seagate Technology LLC
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