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10 Constellation.2 Serial ATA Product Manual, Rev. B
Table 2: 1000GB drive (Standard & SED model) DC power requirementss
Parameter
Voltage +5 V +12 V Power +5 V +12 V Power
Regulation (watts) (watts)
AverageIdleCurre nt 0.27 0.16 3.2 7 0.27 0.16 3.31
AdvancedIdleCurrent
Idle1 0.22 0.16 3.07 0.23 0.16 3.10
Idle2 0.15 0.13 2.33 0.16 0.13 2.36
Idle3 0.15 0.09 1.86 0.16 0.09 1.89
Standb
y
0.14 0.04 1.16 0.14 0.04 1.19
AverageSleepCurrent 0.14 0.04 1.1 5 0.14 0.04 1.20
MaximumStartCurrent:
DC(PeakDC) 0.51 0.99 14.43 0.52 0.99 14.50
AC(PeakAC) 0 .72 1.37 19.99 0.66 1.36 19.61
DelayedMot orStart(DCmax) 0.14 0.04 1.18 0.15 0.04 1.23
PeakOperatingCurrent(randomread):
Typ icalDC 0.29 0.32 5.26 0.31 0.31 5.21
MaximumDC 0.32 0.33 5.56 0.34 0.33 5.65
MaximumDC(peak) 1.020.9015.901.000.8815.56
PeakOperatingCurrent(randomwrite):
Typ icalDC 0.38 0.27 5.19 0.39 0.27 5.19
MaximumDC 0.40 0.28 5.40 0.41 0.28 5.46
MaximumDC(peak) 0.960.9015.600.960.9015.60
Peakoperatingcurrent(sequentialread ):
Typ icalDC 0.61 0.18 5.19 0.62 0.18 5.24
MaximumDC 0.64 0.19 5.42 0.65 0.18 5.45
MaximumDC(peak) 0.82 0.36 8.42 0.84 0.36 8.52
Peakoperatingcurrent(sequentialwrite) :
Typ icalDC 0.76 0.18 5.93 0.76 0.18 5.95
MaximumDC 0.79 0.19 6.16 0.80 0.19 6.22
MaximumDC(peak) 0.98 0.34 8.98 0.98 0.36 9.22
ST91000640NS ST91000640NS
(3.0GB) (6.0GB)
+10/-7.5% +10/-7.5%
*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.