Seagate Understanding DC Power Requirements for Drives

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Table 4:	DC power requirements

Power dissipation (typical)		Average (watts, 25° C)	5V typ amps	12V typ amps

Spinup		—	—	2.8 (peak)

Idle		7.2	0.401	0.433

Idle* (with offline activity)		9.1	0.78	0.433

Operating	(40% r/w, 40% seek, 20% inop.)	12.8	0.841	0.715

Seeking (random, 20% idle)		12.4	0.602	0.782

Standby		1.4	0.265	0.006

Sleep		1.4	0.265	0.006

*During periods of drive idle, some offline activity may occur according to the S.M.A.R.T. specification, which may increase acoustic and power to operational levels.

2.8.1.1Typical current profiles

Figure 1. Typical 5V startup and operation current profile

Figure 2. Typical 12V startup and operation current profile

14	Barracuda 7200.8 Serial ATA Product Manual, Rev. F

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Contents Barracuda 7200.8 Serial ATA Page Contents Barracuda 7200.8 Serial ATA Product Manual, Rev. F List of Figures Page Introduction Barracuda 7200.8 Serial ATAAbout the Serial ATA interface Drive specifications Specification summary tablesDrive specifications for 400 Gbyte models Drive specification ST3400832AS ST3400632ASDrive specifications for 400 Gbyte models Drive specifications for 300 Gbyte models Drive specification ST3300831AS ST3300631ASWill be asked to provide the drive serial number, model Drive specifications for 250 and 200 Gbyte models Drive specification ST3250823AS ST3250623AS ST3200826ASTo access the following web Default logical geometry LBA modeFormatted capacity Cylinders Read/write heads Sectors per track 16,383Physical characteristics Recording and interface technologyTypical seek times msec Read Write Seek timeStart/stop times Power specifications DC power requirements Typical current profilesPower-management modes Active modeIdle mode Sleep modeEnvironmental specifications Acoustics Electromagnetic immunity ReliabilityRadio frequency environments Test Description Performance level Reference standardSafety certification Agency certificationElectromagnetic compatibility Korean RRLAustralian C-Tick N176 FCC verificationEuropean Union Restriction of Hazardous Substances RoHS Environmental protectionCorrosive environment Barracuda 7200.8 Serial ATA Product Manual, Rev. F Configuring and mounting the drive Handling and static-discharge precautionsConfiguring the drive Serial ATA cables and connectorsMounting dimensions-top, side and end view Drive mountingBarracuda 7200.8 Serial ATA Product Manual, Rev. F 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 F4H Identify Device command Word Description ValueXx07H Description if bit is set to Bit Word Bit WordSet Features command Set Features command valuesCode in features register A.R.T. command 3 S.M.A.R.T. commandsM.A.R.T. commands Barracuda 7200.8 Serial ATA Product Manual, Rev. F Technical Support InternetPresales Support Data Recovery Services Call Center Toll-free Direct dial Warranty ServiceData Recovery Services Authorized Service Centers Index Page Sata Page Page Seagate Technology LLC