Maxtor STM3320820AS, STM3160815AS manual Power-management modes, Active mode, Idle mode, Sleep mode

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2.8.4Power-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	Tracking	Rotating	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 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.

22	DiamondMax 21 Serial ATA Product Manual, Rev. C

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Contents DiamondMax Revision status summary sheet Contents DiamondMax 21 Serial ATA Product Manual, Rev. C List of Figures Typical 5V startup and operation current profilePage Introduction About the Serial ATA interface Drive specifications Specification summary tablesDrive specifications summary for 500 Gbyte models Drive specification STM3500630ASYes Drive specifications summary for 320 Gbyte models Drive specification STM3320820AS STM3320620ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for 250 Gbyte models Drive specification STM3250824AS STM3250820AS STM3250310ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for the 160 Gbyte models Drive specification STM3160815AS STM3160215ASDiamondMax 21 Serial ATA Product Manual, Rev. C Drive specifications summary for the 80 Gbyte model Drive specification STM380815AS STM380215ASYears on distribution units Drive specifications summary for the 40 Gbyte model Drive specification STM340215ASDiamondMax 21 Serial ATA Product Manual, Rev. C Default logical geometry LBA modeFormatted capacity Cylinders Read/write heads Sectors per track 16,383STM3160815AS, STM3160215AS Recording and interface technologySTM3250310AS STM380815AS, STM380215AS and STM340215AS Physical characteristics Power specifications Seek timeStart/stop times STM3250820AS 500-320 GB STM3250824AS STM3250310AS 160 40 GBPower consumption Spinup powerIdle mode power Seek modeConducted noise Typical current profilesVoltage tolerance Power-management modes Active modeIdle mode Sleep modeEnvironmental specifications Nonoperating shock VibrationOperating vibration Nonoperating vibrationAcoustics Electromagnetic immunityFluid Dynamic Bearing FDB motor acoustics Radio frequency environmentsSafety certification ReliabilityAgency certification Electromagnetic compatibilityAustralian C-Tick N176 Korean RRLFCC verification Corrosive environment Environmental protectionChina Restriction of Hazardous Substances RoHS Directive Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsDrive mounting Drive dimensions for 40-160 GB and STM3250310AS models Serial ATA Sata interface Hot-Plug compatibilitySerial ATA device plug connector pin definitions Serial ATA connector pin definitionsSignal Pin Function DefinitionSupported ATA commands Supported ATA commandsCommand name Command code in hex F4H Identify Device command Word Description ValueXx07H 100 Description if bit is set to Bit Word Bit WordSet Features command Set Features command valuesM.A.R.T. commands 3 S.M.A.R.T. commandsCode in features register A.R.T. command Maxtor support services DiamondMax 21 Serial ATA Product Manual, Rev. C Index ITE Page DiamondMax 21 Serial ATA Product Manual, Rev. C Page Seagate Technology LLC