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case power consumption, using only random seeks with read or write latency time. This mode is not typical and is provided for worst-case information.
• Read/write power and current
Read/write power is measured with the heads on track, based on a 16-sector write followed by a 32-ms delay, then a 16-sector read followed by a 32-ms delay.
• Operating power and current
Operating power is measured using 40 percent random seeks, 40 percent read/write mode (1 write for each 10 reads) and 20 percent drive idle mode.
• Idle mode power
Idle mode power is measured with the drive up to speed, with servo electronics active and with the heads in a random track location.
• Standby mode
During standby mode, the drive accepts commands, but the drive is not spinning, and the servo and read/write electronics are in power-down mode.
Table 2 DC power requirements (3TB)
Power dissipation | Avg (watts 25° C) | Avg 5V typ amps | Avg 12V typ amps |
| | | |
Spinup | — | — | 2.0 (peak) |
| | | |
Idle* † | 7.37 | 0.272 | 0.501 |
| | | |
Operating (average) | 9.2 | 0.628 | 0.506 |
| | | |
Standby | 0.55 | 0.082 | 0.012 |
| | | |
Sleep | 0.55 | 0.082 | 0.012 |
| | | |
Table 3 DC power requirements (2TB) | | | |
| | | |
Power dissipation | Avg (watts 25° C) | Avg 5V typ amps | Avg 12V typ amps |
| | | |
Spinup | — | — | 2.8 (peak) |
| | | |
Idle* † | 6.39 | 0.27 | 0.42 |
| | | |
Operating (average) | 9.23 | 0.31 | 0.64 |
| | | |
Standby | 0.57 | 0.09 | 0.01 |
| | | |
Sleep | 0.57 | 0.09 | 0.01 |
| | | |
*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.
†5W IDLE with DIPLM Enabled
Note | Drive supports PHY layer power management. When enabled, a power savings of ~300mw can be |
achieved in idle, standby and sleep modes. |
| |
Barracuda XT SATA Product Manual, Rev. D | 13 |
100586689 Rev. D September
BarracudaXT
Revision Date Description of changes
Revision History
Contents
Barracuda XT Sata Product Manual, Rev. D
Figures
Barracuda XT Sata Product Manual, Rev. D
Seagate Technology Support Services
Barracuda XT Sata Product Manual, Rev. D
About the Serial ATA interface
Introduction
Drive Specifications
Default logical geometry
LBA mode
Formatted capacity
Power specifications
Physical characteristics
Recording and interface technology
Start/stop times
Operating power and current
Read/write power and current
Idle mode power
Standby mode
Typical 12V startup and operation current profiles 3000GB
Typical 5V startup and operation current profiles 3000GB
Typical 12V startup and current profiles 2000GB
Typical 5V startup and current profiles 2000GB
Conducted noise
Power management modes
Voltage tolerance
Temperature gradient
Environmental specifications Ambient temperature
Humidity
Altitude
Vibration
Shock
Acoustics
Electromagnetic immunity
Test for Prominent Discrete Tones PDTs
Test Description Performance level Reference Standard
Agency certification Safety certification
Warranty
Electromagnetic Compatibility EMC
FCC verification
China Restriction of Hazardous Substances RoHS Directive
Environmental protection
Corrosive environment
Drive Specifications
Configuring the drive
Handling and static-discharge precautions
Serial ATA cables and connectors
Attaching Sata cabling
Drive mounting
Mounting dimensions 3000GB model
Mounting dimensions 2000GB model
Segment Pin Function Definition
3V power
Ground 2nd mate
12V power, pre-charge, 2nd mate
3V power, pre-charge, 2nd mate
12V power
P14
Command name Command code in hex
Supported ATA commands
Command name
Word Description Value
Identify Device command
Number of current logical heads
Or Write Multiple command
Number of current logical sectors per logical track
57-58 Current capacity in sectors
00DEH
BE01H
Fffeh
Bit Word
Enable read look-ahead read cache feature default
Set Features command
AAH
Code in features register A.R.T. command
3 S.M.A.R.T. commands
Barracuda XT Sata Product Manual, Rev. D
Master/slave 9 mounting
Barracuda XT Sata Product Manual, Rev. D
Barracuda XT Sata Product Manual, Rev. D
Barracuda XT Sata Product Manual, Rev. D
Page
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