Hitachi HUS154530VLF400, HUS154545VLF400 9.1 Power Supply Current, Average and Peak

Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
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9.1 Power Supply Current, Average and Peak
The following current and power requirements are typical when operating under the following conditions: Nominal 5 and 12V,
Background Media Scan (BMS) disabled for Idle, Write Caching disabled and the drive reporting a temperature of 45C.
Model FC 4 Gb/s 450 GB Current Current Power Note
IO / Sec +5V +12V Watts
Start Peak Power DC --- 1.92 ---
Start Peak Power AC 1.11 2.45
Idle 0.83 0.72 12.7 Average
Idle Ripple 0.25 0.26 --- Peak to Peak
Random W / R Peak 206 1.36 2.26 2KB Qd=4
Random W / R Average 206 0.86 1.07 17.1 2KB Qd=4
Random W / R Average 158 0.84 1.04 16.6 2KB Qd=1
120 0.84 1.01
90 0.84 0.99
60 0.84 0.98
30 0.84 0.97
Sequential Read Peak 1.60 Maximum Transfer Rate
Sequential Read Average 1.36 0.74 15.7 Maximum Transfer Rate
Sequential W r ite Peak 1.65 --- --- M aximum T r ansfer Rate
Sequential Writ e Av er age 1.37 0.74 15.7 Maxim u m T ransfer Rate
BMS Average 0.92 0.74 13.5
BMS Peak 1.54
5V
12V
Spin up Calibrate
Power on
12 V
2 Sec / Div
1A / Div
Peak DC
Peak AC
450 GB
2 A
1 A
0 A
0 A
1 A
5 V
2 Sec / Div
0.5A / Div
Spin up Calibrate
Power on
12 V
2 Sec / Div
1A / Div
Peak DC
Peak AC
450 GB
2 A
1 A
0 A
0 A
1 A
5 V
2 Sec / Div
0.5A / Div