Seagate 15K.3 ST373453FC Model Product Manual PDF - Page 36
Cheetah 15K.3 FC Product Manual, Rev. D, Power dissipation, ST373453FC, ST336753FC
UPC - 000004165019
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26 Cheetah 15K.3 FC Product Manual, Rev. D 6.3 Power dissipation ST373453FC Typical power dissipation under idle conditions in 2Gb operation is 12.7 watts (43.3 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 8). 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. ST373453FC DC CURRENT/POWER vs THROUGHPUT (1Gb) Random 8 Block Reads 5Vo lt A 12 Vo lt A 1.800 18.00 Watts 1.600 16.00 Amperes Power (watts) 1.400 14.00 1.200 12.00 1.000 10.00 0.800 8.00 0.600 6.00 0.400 0.0 4.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 I/Os per Second Figure 8. ST373453FC DC current and power vs. input/output operations per second ST336753FC Typical power dissipation under idle conditions in 2Gb operation is 11.0 watts (37.5 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 8). 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. ST336753FC DC CURRENT/POWER vs THROUGHPUT (1Gb) Random 8 Block Reads 1.800 18.00 5Vo lt A 1.600 16.00 12 Vo lt A Watts 1.400 14.00 Amperes Power (watts) 1.200 12.00 1.000 10.00 0.800 8.00 0.600 6.00 0.400 0.0 4.00 50.0 100.0 150.0 200.0 250.0 300.0 350.0 I/Os per Second Figure 9. ST336753FC DC current and power vs. input/output operations per second