Seagate ST3500410AS manual Conducted noise, Voltage tolerance, Power-management modes, Active mode

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2.7.2Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 80-ohm resistive load on the +12 volt line or an equivalent 15-ohm resistive load on the +5 volt line.

•Using 12-volt power, the drive is expected to operate with a maximum of 120 mV peak-to-peak square-wave injected noise at up to 10 MHz.

•Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave injected noise at up to 10 MHz.

Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.

2.7.3Voltage tolerance

Voltage tolerance (including noise):

5V +10% / -7.5%

12V +10% / -7.5%

2.7.4Power-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 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.

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Barracuda 7200.12 Serial ATA Product Manual, Rev. B

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Contents Barracuda 7200.12 Serial ATA Revision history Revision Date Sheets affected or commentsContents Barracuda 7200.12 Serial ATA Product Manual, Rev. B List of Figures Page Introduction About the Serial ATA interface Drive specifications Drive specifications summary for 1000 and 750 Gbyte models Will display the warranty information for your drive Drive specifications summary for 500 Gbyte models Tem will display the warranty information for your drive Drive specifications summary for 250 Gbyte models Will display the warranty information for your drive Default logical geometry LBA modeFormatted capacity Cylinders Read/write heads Sectors per track 16,383Physical characteristics Recording and interface technologySeek time Start/stop timesTypical seek times msec Read Write 750 GB models 500, 320, 250 and 160 GB modelsPower specifications Power-management modes Active modeIdle mode Sleep modeEnvironmental specifications Shock Operating shockNonoperating shock 750 GB models 500, 320, 250 and 160 GB modelsAcoustics Electromagnetic immunityFluid Dynamic Bearing FDB motor acoustics Test for Prominent Discrete Tones PDTsSafety certification ReliabilityAgency certification Electromagnetic compatibilityFCC verification Korean RRLAustralian C-Tick N176 Environmental protection Corrosive environmentConfiguring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions 1000 and 750 GB models Drive mountingMounting dimensions 500, 320, 250 and 160 GB models Serial ATA Sata interface Hot-Plug compatibilitySerial ATA device plug connector pin definitions Serial ATA connector pin definitionsSignal Pin Function DefinitionCommand name Command code in hex Supported ATA commandsSupported ATA commands F3H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordShall be cleared to Set Features command Set Features command valuesCode in features register A.R.T. command 3 S.M.A.R.T. commandsM.A.R.T. commands Technical Support Seagate Technology support servicesPresales Support Data Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index ITE Page Barracuda 7200.12 Serial ATA Product Manual, Rev. B Page Seagate Technology LLC
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