Table 18 Input Voltage; Table 19 Power Supply Current Of 3 Disk Sata Models; Dc Power Requirements - Hitachi HDS721050CLA362 Specifications

DC power requirements

6.3
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
+5 Volts Supply
+12 Volts Supply
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
(values in milliamps. RMS)
Idle average
Idle ripple (peak-to-peak)
Low RPM idle
Low RPM idle ripple
Unload idle average
Unload idle ripple
1
Random R/W average
Random R/W peak
Random R/W average(Quiet Seek)
Random R/W peak(Quiet Seek)
Start up (max)
Standby average
Sleep average
Table 18
Power supply current of 3 Disk SATA models
Except for a peak of less than 100
1
Random R/W : 40 IOPS / 16 Blocks Random Write and Random Read
HITACHI Deskstar & CinemaStar 7K1000.B & Deskstar E7K1000 Hard Disk Drive specification
During run and spin up
5V ± 5%
12V ±10%
+5 Volts [mA]
Pop Mean Std Dev
210
200
140
100
140
100
270
800
280
800
1100
120
120

s duration
26
Absolute max
spike voltage
–0.3 to 5.5V
–0.3 to 15.0V
+12 Volts [mA]
Pop Mean
5 340
10 300
5 140
10 250
5 310
10 300
10 630
30 1700
10 420
30 1500
20 1870
5 8
5 9
Supply rise time
0 to 5sec
0 to 5sec
Total
[W]
Std Dev
10
5.2
10
10
2.4
10
10
4.4
10
20
8.9
30
10
6.4
30
40
3 0.7
3 0.7