Quantum 10K II - Manual (Page 62)

Specifications
Quantum Atlas 10K II Ultra 160/m SCSI Hard Disk Drives 4-7
4.5.3 Power Requirements
This section lists the various power specifications for the Quantum Atlas 10K II
Ultra 160/m SCSI hard disk drives.
4.5.3.1 Power Consumption
Maximum Watts
9.2 GB 18.4 GB 36.7 GB 73.4 GB
Startup (Peak) 38.8 W* 38.8 W* 38.8 W* 47.6 W*
40% Seek (ECMA) 15.0 W 15.0 W 16.7 W 20.7 W
Idle 8.6 W 8.6 W 9.9 W 14.7 W
* Quantum Corporation’s startup peak current measurements are based on a
2.5 ms sampling rate. The industry typical sampling rate is 20ms and,
therefore, the Quantum stated startup peak power data appear to be higher
than the industry typical numbers.
NOTE
ECMA Seek Rate is defined in ECMA standard 74. It corresponds to 52
random seeks per second.
4.5.3.2 DC Voltage Tolerances
Nominal Voltage Voltage Tolerance Absolute Limits
5 Vdc Supply ± 5% 4.75 - 5.25 Vdc
12 Vdc Supply ± 5% ( ± 6% transient during spin-up) 11.4 - 12.6 Vdc
CAUTION
Polarity must not be reversed at any time. Reversing polarity at any time on
either power line may damage components. Voltage is measured at the drive
power connector.