Seagate ST9146853SS Savvio 15K.1 FC User Guide - Page 37
ST936751FC
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ST936751FC Typical power dissipation under idle conditions in 1Gb operation is 5.35 watts (18.26 BTUs per hour). Typical power dissipation under idle conditions in 2Gb operation is 5.4 watts (18.43 BTUs per hour). Typical power dissipation under idle conditions in 4Gb operation is 5.75 watts (19.62 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. FC CURRENT/POWER vs THROUGHPUT (FC - 1GB) Random 8 Block Reads 1.400 14.00 5Volt A 1.200 12.00 12 Volt A Wat t s 1.000 10.00 Amperes Power (watts) 0.800 8.00 0.600 6.00 0.400 4.00 0.200 2.00 0.000 0.0 0.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0 450.0 I/Os per Second Figure 7. ST936751FC DC current and power vs. input/output operations per second at 1 Gbit Amperes 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.000 0.0 FC CURRENT/POWER vs THROUGHPUT (FC - 2GB) Random 8 Block Reads 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0 450.0 I/Os per Second Power (watts) 5Volt A 12 Volt A Wat t s Figure 8. ST936751FC DC current and power vs. input/output operations per second at 2 Gbit Savvio 15K.1 FC Product Manual, Rev. B 29