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Power Line Noise Limits
Noise Voltage (mV pp)
Frequency Range
+5V DC
250
100Hz-20MHz
+12V DC
800
100Hz-8KHz
450
8KHz-100KHz
250
100KHz-20MHz
Table 18 Allowable Power Supply Noise Limits at Drive Power Connector
During drive operation, both 5 and 12-volt ripple are generated by the drive due to dynamic loading of the power
supply. This voltage ripple will add to existing power supply voltage ripple. The sum is the power line noise.
To prevent significant performance loss, the power line noise level when measured at the drive power connector
should be kept below the limits in the above table.
Power Consumption Efficiency
Power Consumption
Efficiency at Idle_0
SATA W/GB
6TB
0.00102
4TB
0.00128
Table 19 Power Consumption Efficiency
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Western Digital Ultrastar DC HC310 SATA Product Manual