User manual

Hitachi hard disk drive specifications
30
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
2 Disk model
+5 Volts [mA]
+12 Volts [mA]
Total
[W]
(values in milliamps. RMS)
Pop Mean
Pop Mean
Idle average
230
270
4.4
Idle ripple (peak-to-peak)
200
400
Low RPM idle
170
100
2.1
Low RPM idle ripple
100
250
Unload idle average
170
250
3.9
Unload idle ripple
100
300
Random R/W average
1
330
560
8.4
(8.6) *1
(580) *1
Random R/W peak
1100
1700
Random R/W average(Quiet Seek)
350
330
5.7
Random R/W peak(Quiet Seek)
1100
1500
Start up (max)
1100
1800
Standby average
160
7
0.9
Sleep average
160
7
0.9
Table 18 Power supply current of 2 Disk model
*1 : for Ultrastar only
Except for a peak of less than 100 s duration
1
Random R/W : 35 IOPS / 16 Blocks Random Write and Random Read