Seagate Savvio 10K Savvio 10K.1 SAS Product Manual - Page 36
Power dissipation
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6.3 Power dissipation ST973401SS in 3 Gbit operation Typical power dissipation under idle conditions in 3Gb operation is 7.43 watts (25.35 BTUs per hour). 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. Amperes ST973401SS DC CURRENT/POWER vs THROUGHPUT (3Gbit) Random 8 Block Reads 1.800 18.00 1.600 16.00 1.400 14.00 1.200 12.00 1.000 10.00 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 I/Os per Second Power (watts) 5Volt A 12 Volt A Watts Figure 6. ST973401SS (3 Gbit) DC current and power vs. input/output operations per second ST973401SS in 1.5 Gbit operation Typical power dissipation under idle conditions in 1.5 Gbit operation is 7.49 watts (25.56 BTUs per hour). 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. Amperes ST973401SS DC CURRENT/POWER vs THROUGHPUT (3Gbit) Random 8 Block Reads 1.800 18.00 1.600 16.00 1.400 14.00 1.200 12.00 1.000 10.00 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 I/Os per Second Power (watts) 5Volt A 12 Volt A Watts Figure 7. ST973401SS (1.5 Gbit) DC current and power vs. input/output operations per second 30 Savvio SAS Product Manual, Rev. D