Quantum 10K II - Manual (Page 64)

Specifications
Quantum Atlas 10K II Ultra 160/m SCSI Hard Disk Drives 4-9
4.5.3.4 Current Transients
Spin-Up Mode
Max. Positive Rate of Change +2.0 A in 200 µs
Max. Negative Rate of Change -2.0 A in 50 µs
12 Vdc Supply Regulations ± 5%
Active Mode (ECMA Seeking)
Max. Positive Rate of Change +1.0 A in 200 µs
Max. Negative Rate of Change -1.0 A in 200 µs
12 Vdc Supply Regulations ± 5%
NOTE
ECMA Seek Rate is defined in ECMA standard 74. It corresponds to 52
random seeks per second.
NOTE
Instantaneous Peak Current transients of <3A for <50 µs may occur during
spin-up.
4.5.3.5 Supply Ripple Voltage and Noise
Supply Noise Voltage is the AC component from 100 KHz to 50 MHz measured with
the supply operating the drive.
5 Vdc Supply Noise 150 mV p - p maximum
12 Vdc Supply Noise 250 mV p - p maximum
4.5.3.6 DC Voltage Monitoring
Unsafe Voltage Detection Level
5 Vdc Supply Too Low 4.50 V nominal trip point
12 Vdc Supply Too Low 10.1 V nominal trip point