Hitachi HDS721050CLA362 - Table 18 Input Voltage; Table 19 Power Supply Current of 3 Disk SATA Models; DC Power Requirements

HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
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6.3 DC power requirements
Damage to the drive electronics may result if the power supply cable is connected or disconnected to the legacy
Power connector while power is being applied to the drive (no hot plug/unplug is allowed). If SATA power supply
cable is connected or disconnected to the SATA power connector, hot plug/unplug is allowed.
6.3.1 Input voltage
Input voltage
During run and spin up
Absolute max
spike voltage
Supply rise time
+5 Volts Supply
5V ± 5%
–0.3 to 5.5V
0 to 5sec
+12 Volts Supply
12V ±10%
–0.3 to 15.0V
0 to 5sec
Table 17 Input voltage
Caution : To avoid damage to the drive electronics, power supply voltage spikes must not exceed
specifications.
6.3.2 Power supply current (typical)
Power supply current of
3 Disk SATA models
+5 Volts [mA]
+12 Volts [mA]
Total
[W]
(values in milliamps. RMS)
Pop Mean
Std Dev
Pop Mean
Std Dev
Idle average
210
5
340
10
5.2
Idle ripple (peak-to-peak)
200
10
300
10
Low RPM idle
140
5
140
10
2.4
Low RPM idle ripple
100
10
250
10
Unload idle average
140
5
310
10
4.4
Unload idle ripple
100
10
300
10
Random R/W average
1
270
10
630
20
8.9
Random R/W peak
800
30
1700
30
Random R/W average(Quiet Seek)
280
10
420
10
6.4
Random R/W peak(Quiet Seek)
800
30
1500
30
Start up (max)
1100
20
1870
40
Standby average
120
5
8
3
0.7
Sleep average
120
5
9
3
0.7
Table 18 Power supply current of 3 Disk SATA models
Except for a peak of less than 100 s duration
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Random R/W : 40 IOPS / 16 Blocks Random Write and Random Read