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6.3.3 Power line noise limits
Table 13 Allowable power supply noise limits at drive power connector
Noise Voltage (mV pp)
Frequency Range
+5V DC
250
100Hz-20MHz
+12V DC
800
100Hz-8KHz
450
8KHz-100KHz
250
100KHz-20MHz
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.
6.3.4 Power Consumption Efficiency
Table 14 Power consumption efficiency
Power Consumption
Efficiency at Idle
SATA 24TB
SATA 22TB
W/TB
0.238
0.259
W/GB
0.000238
0.000259
6.4 Workload
6.4.1 Workload
The maximum rated workload is <550TB/YR. The workload can be comprised of reads and/or writes.
The maximum rated workload is specified for operating at typical temperatures.
Occasional* excursions in operating conditions between the “typical AFR specification conditions” and the
“maximum drive operating conditions” may occur without significant impact to reliability.
*Occasional excursions shall not exceed 2% of total run time.
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Hard Disk Drive Specification