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Constellation ES Serial ATA Product Manual, Rev. G 11
*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.
Table 4: 500GB Drive DC power requirements
1.5Gb mode 3.0Gb mode
Voltage +5V +12V Power +5V +12V Power
Regulation ±5% ±5% (Watts) ±5% ±5% (Watts)
Avg Idle Current * 0.26 0.20 3.71 0.28 0.20 3.74
Advanced Idle Current *
Idle_A 0.13 0.21 3.13 0.14 0.21 3.17
Idle_B 0.13 0.18 2.82 0.14 0.18 2.85
Idle_C 0.13 0.07 1.50 0.14 0.07 1.52
Standby 0.09 0.01 0.53 0.09 0.01 0.55
Transition Current *
Idle_A (Active) 0.84 0.52 10.44 0.84 0.54 10.68
Idle_B (Active) 0.70 1.11 16.81 0.80 1.13 17.56
Idle_C (Active) 0.70 2.45 32.91 0.72 2.43 32.77
Standby (Active) 0.80 2.59 35.08 0.84 2.59 35.28
Average Sleep Current 0.09 0.01 0.54 0.09 0.01 0.56
Maximum Start Current
DC (peak DC) 0.36 2.03 26.14 0.36 2.03 26.14
AC (Peak DC) 0.55 2.59 33.83 0.63 2.59 34.24
Delayed Motor Start (DC max) 0.09 0.01 0.55 0.09 0.01 0.59
Peak operating current (random read):
Typical DC 0.29 0.42 6.45 0.29 0.42 6.47
Maximum DC 0.30 0.42 6.56 0.30 0.42 6.54
Maximum DC(peak) 1.00 1.38 27.56 1.00 1.38 21.32
Peak operating current (random write)
Typical DC 0.31 0.32 5.32 0.31 0.31 5.31
Maximum DC 0.31 0.33 5.48 0.31 0.32 5.45
Maximum DC(peak) 1.20 1.40 22.80 1.20 1.38 22.56
Peak operating current (sequential read)
Typical DC 0.62 0.21 5.63 0.62 0.21 5.62
Maximum DC 0.63 0.21 5.72 0.63 0.21 5.72
Maximum DC(peak) 1.02 0.46 10.62 1.02 0.46 10.62
Peak operating current (sequential write)
Typical DC 0.66 0.21 5.84 0.66 0.21 5.82
Maximum DC 0.67 0.21 5.92 0.67 0.21 5.89
Maximum DC(peak) 1.34 0.46 12.22 1.30 0.48 12.26