User Manual

Constellation.2 SAS Product Manual, Rev. K 34
6.4 Power dissipation
1TB model drive 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 3. 1TB Models (3Gb) DC current and power vs. input/output operations per second
Note. For power details about SED vs. non-SED drive, please refer to section 7.8.