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CONSTELLATION ES.3 SAS PRODUCT MANUAL, REV. B 29
6.4 POWER DISSIPATION
4TB models in 3Gb operation
Please refer to Table 2 for power dissipation numbers.
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). Locate the typical I/O
rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the
vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 5. 4TB models (3Gb) DC current and power vs. input/output operations per second
4TB models in 6Gb operation
Please refer to Table 2 for power dissipation numbers.
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 6.). Locate the typical I/O
rate for a drive in your system on the horizontal axis and read the corresponding +5 volt current, +12 volt current, and total watts on the
vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 6. 4TB models (6Gb) DC current and power vs. input/output operations per second