Hitachi 7K100 Hard Drive Specifications - Page 38
DC power requirements
UPC - 683728198671
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6.2 DC power requirements Connection to the product should be made in a safety extra low voltage (SELV) circuits. The voltage specifications are applied at the power connector of the drive. Table 15: DC power requirements Item Nominal supply Supply voltage Power supply ripple (0-20 MHz) 1 Tolerance2 Supply rise time Requirements +5Volt DC -0.3 Volt to 6.0 Volt 100mV p-p max. ±5% 7-100 ms Watts (RMS typical) Performance Idle average3 1.8 Active Idle average 1.1 Low Power Idle average 0.85 Read average 4 2.0 Write average 2.0 Seek average 5 2.3 Standby 0.20 Sleep 0.1 Startup (max. peak) 6 5.5 Average from power on to ready 3.8 Footnotes: 1 The maximum fixed disk ripple is measured at the 5 volt input of the drive. 2 The disk drive shall not incur damage for an over voltage condition of +25% (maximum duration of 20 ms) on the 5 volt nominal supply. 3 The idle current is specified at an inner track. 4 The read/write current is specified based on three operations of 63 sector read/write per 100 ms. 5 The seek average current is specified based on three operations per 100 ms. 6 The worst case operating current includes motor surge. 6.2.1 Power consumption efficiency Table 16: Power consumption efficiency Capacity Power Consumption Efficiency (Watts/GB) 100 GB 0.0085 80 GB 60 GB 0.0106 0.0142 Note: Power consumption efficiency is calculated as Power Consumption of Low Power Idle in Watts/Capacity (GB). Travelstar 7K100 Hard Disk Drive Specification 24