Power Dissipation; Figure 4. St9146802Ss (3Gb) Dc Current And Power Vs. Input/Output Operations Per Second; Figure 5. St973402Ss (3Gb) Dc Current And Power Vs. Input/Output Operations Per Second - Seagate ST300MM0026 Product Manual

7.3

Power dissipation

ST9146802SS in 3Gb operation
Typical power dissipation under idle conditions in 3Gb operation is 5.18W (17.68 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
4). 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 4. ST9146802SS (3Gb) DC current and power vs. input/output operations per second
ST973402SS in 3Gb operation
Typical power dissipation under idle conditions in 3Gb operation is 5.14W (17.54 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
4). 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. ST973402SS (3Gb) DC current and power vs. input/output operations per second
Savvio 10K.2 SAS Product Manual, Rev. E 25