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
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.
