Seagate ST9250610NS, ST9500622NS manual Power-management modes, Active mode, Idle mode, Sleep mode

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3.8.4Power-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:

Power modes

Heads

Spindle

Buffer

 

 

 

 

Active

Tracking

Rotating

Enabled

 

 

 

 

Idle_a

ID Biased

Rotating

Enabled

 

 

 

 

Idle_b

Parked

Rotating

Enabled

 

 

 

 

Idle_c

Parked

Rotating at lower RPM

Enabled

 

 

 

 

Standby

Parked

Stopped

Enabled

 

 

 

 

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 buf- fer 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.

3.8.4.1Extended Power Conditions - PowerChoiceTM

Utilizing the load/unload architecture a programmable power management interface is provided to tailor sys- tems for reduced power consumption and performance requirements.

The table below lists the supported power conditions available in PowerChoice. Power conditions are ordered from highest power consumption (and shortest recovery time) to lowest power consumption (and longest recovery time) as follows: Idle_a power >= Idle_b power >= Idle_c power >= Standby_z power. The further you go down in the table, the more power savings is actualized. For example, Idle_b results in greater power sav- ings than the Idle_a power condition. Standby results in the greatest power savings.

Constellation.2 Serial ATA Product Manual, Rev. B

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Contents ST91000642NS ST9500622NS ST9250612NS Standard Models Self-Encrypting Drive ModelsSED Fips 140-2 Models Revision Date Sheets affected or comments Revision historyContents Serial ATA Sata interface List of Figures Page Seagate Online Support and Services Seagate Technology support servicesIntroduction About the Serial ATA interface Specification summary tables Drive specificationsDrive specifications summary for 1TB, 500 and 250 GB models Constellation.2 Serial ATA Product Manual, Rev. B LBA mode Default logical geometryFormatted capacity Recording and interface technologySeek time Physical characteristicsStart/stop times Typical seek times ms Read WritePower consumption Power specificationsSpinup power Standby modePower 1000GB drive Standard & SED model DC power requirementssST91000640NS Parameter 0GB Voltage +12 Regulation +10/-7.5% WattsST9500620NS Parameter 0GB Voltage +12 500GB drive Standard & SED model DC power requirementsST9250610NS Parameter 0GB Voltage +12 250GB drive Standard & SED model DC power requirementsTypical current profiles Voltage tolerance Conducted noiseActive mode Power-management modesIdle mode Sleep modePower Condition Name Power Condition ID Description PowerChoice is invoked using one of two methodsTemperature a. Operating Environmental limitsRelative humidity Shock Effective altitude sea levelOperating shock Nonoperating shockVibration AcousticsOperating vibration Nonoperating vibrationReliability Electromagnetic immunityRadio frequency environments Test Description Performance level Reference standardAgency certification Product warranty Environmental protectionReference documents Shipping StorageProduct repair and return information China Restriction of Hazardous Substances RoHS Directive Corrosive environmentHandling and static-discharge precautions Configuring and mounting the driveSerial ATA cables and connectors Configuring the driveDrive mounting Mounting dimensions-top, side and end viewAir flow CoolingAbout Fips PurposeLevel 2 security Admin SP Controlled accessAbout self-encrypting drives Data encryptionRandom number generator RNG Default passwordDrive locking Data bandsPower requirements Authenticated firmware downloadSupported commands Cryptographic eraseHot-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 WordWord Set Features command values Set Features command3 S.M.A.R.T. commands A.R.T. commandsCode in features register A.R.T. command Index ITE Page Constellation.2 Serial ATA Product Manual, Rev. B Page Disc Drive, Scotts Valley, California 95066-4544, USA
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