Seagate Enterprise Capacity 3.5 HDD/Constellation ES Constellation ES (.1) SA - Page 12
Stop Times, Ower Specifications
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2.7 START/STOP TIMES Power-on to Ready (sec) Standby to Ready (sec) Ready to spindle stop (sec) 2TB models 15 (max) 15 (max) 20 (max) 1TB models 10 (max) 10 (max) 500GB models 7 (max) 7 (max) 2.8 POWER SPECIFICATIONS The drive receives DC power (+5V or +12V) through a native SATA power connector. See Figure 5 on page 24. 2.8.1 Power consumption Power requirements for the drives are listed in the table on page 9. Typical power measurements are based on an average of drives tested, under nominal conditions, using 5.0V and 12.0V input voltage at 25°C ambient temperature. • 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 disc surface and does not execute a read or write operation. Servo electronics are active. Seek mode power represents the worst-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 32ms 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. CONSTELLATION ES SERIAL ATA PRODUCT MANUAL, REV. F 7