Hitachi 7K250 Specifications - Page 43
DC power requirements - sata
UPC - 000004558972
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6.2.2 Corrosion test The drive shows no sign of corrosion inside and outside of the hard disk assembly and is functional after being subjected to seven days at 50°C with 90% relative humidity. 6.3 DC power requirements Damage to the drive electronics may result if the power supple cable is connected or disconnected to the legacy power connector while power is being applied to the drive (no hot plug/unplug is alloweed). If SATA power supply cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed. 6.3.1 Input voltage Table 21: Input voltage Input voltage supply2 During run and spin up Absolute max spike voltage1 +5 V 5 V ± 5% -0.3 to 7 V +12 V 12 V + 10% -8% -0.3 to 15 V 1To avoid damage to the drive electronics, power supply voltage spikes must not exceed specifications. 2 +12V should be applied within 60 seconds after +5V is applied to the drive. 6.3.2 Power supply current (typical) Table 22: Power supply current of xxx-GB models Power supply current of 250-GB model values in milliamps, RMS +5 Volts (mA) Pop mean Std dev Idle average 280 12 Idle ripple (peak-to-peak) 230 40 Low RPM idle Low RPM idle ripple 140 7 220 25 Unload idle average Unload idle ripple 140 7 220 25 Random R/W average Random R/W peak 430 9 1252 50 Silent R/W average2 Silent R/W peak 470 9 1252 50 Start up (max) 870 51 Standby average 140 9 Sleep average 100 8 +12 Volts (mA) Pop mean Std dev 470 12 330 20 180 10 270 20 350 13 240 20 660 14 1750 50 470 15 995 40 1840 75 20 3 20 3 Total (W) 7.0 2.9 4.9 10.1 8.0 0.9 0.7 Except for a peak of less than 100 ms duration Deskstar 7K250 Hard Disk Drive Specification 29