Datasheet
Seagate BarraCuda Product Manual, Rev. A 9
Drive Specifications
2.6 Start/stop times
2.7 Power Specifications
The drive receives DC power (+5V) through a native SATA power connector (refer to Figure 3).
2.7.1 Power consumption
Power requirements for the drives are listed in the table in Table 4. Typical power measurements are based on an average of drives tested, under
nominal conditions, at 25°C ambient temperature. These power measurements are done with Interface Power Management modes like HIPM
and DIPM enabled.
• Spinup power
Spinup power is measured from the time of power-on to the time that the drive spindle reaches operating speed.
•Seek mode
During seek mode, the read/write actuator arm moves toward a specific position on the disk surface and does not execute a read or write
operation. Servo electronics are active. Seek mode power is measured based on three random seek operations every 100 ms. This mode is not
typical.
• Read/write power and current
Read/write power is measured with the heads on track, based on three 63 sector read or write operations every 100 ms.
•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 3 Start/stop times
Capacity 1-disk models 2-disk models 1-disk models 2-disk models
Typical seek times (ms) Typical Max @ 25°C
Power-on to ready (sec) 2.8 3.3 3.0 3.5
Standby to ready (sec) 2.5 3.0
Table 4 DC Power Requirements
Power Dissipation
1-disk models
+5V input average (25° C)
2-disk models
+5V input average (25° C)
Spinup (max) 1.00A
Write average 1.70W 1.80W
Read average 1.60W 1.70W
Idle, performance
(1)
1. 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.
1.40W 1.50W
Idle, active 0.69W 0.85W
Idle, low power mode 0.45W 0.50W
Standby
(2)
2. Standby power is measured at steady state (after 200ms from transition)
0.13W
Sleep 0.13W