Hitachi 7K400 Specifications - Page 65
DC power requirements
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UPC - 000053412935
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7.2.2 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. 7.3 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. 7.3.1 Input voltage Table 47: Input voltage Input voltage supply2 During run and spin up Absolute max spike voltage1 Supply rise time +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. 0 to 5 sec 0 to 5 sec 2+12V should be applied within 60 seconds after +5V is applied to the drive. 7.3.2 Power supply current (typical) Table 48: Power supply current of PATA model Power supply current of PATA model +5 Volts [mA] (values in milliamps. RMS) Idle average Idle ripple (peak-to-peak) Low RPM idle Low RPM idle ripple Unload idle average Unload idle ripple Random R/W average 1 Random R/W peak Silent R/W average Silent R/W peak Start up (max) Standby average Sleep average Pop Mean 350 230 200 220 200 220 560 1420 610 1420 1100 150 100 Std Dev 12 40 7 30 7 35 9 50 9 50 50 9 8 +12 Volts [mA] Total [W] Pop Mean Std Dev 600 600 280 380 480 600 850 2100 660 1350 2000 20 20 12 9.0 20 10 4.4 20 13 6.8 20 20 13.0 50 15 11.0 40 75 3 1.0 3 0.7 Except for a peak of less than 100 ms duration 1 Random seeks at 40% duty cycle 2 Seek duty = 30%, W/R duty = 45%, Idle duty = 25% Deskstar 7K400 Hard Disk Drive Specification 51
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