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Hitachi Ultrastar 15K450 (FC-AL) Hard Disk Drive Specification
30
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 Write Peak 1.65 --- --- Maximum Transfer Rate
Sequential Write Average 1.37 0.74 15.7 Maximum Transfer 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