Seagate ST336607LC ST3146807LC Model Product Manual PDF - Page 38
ST336607LC DC CURRENT/POWER vs THROUGHPUT Single Ended, Random 8 Block Reads
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28 Cheetah 10K.6 SCSI Product Manual, Rev. D ST336607 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 6.8 watts (23.2 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 7.2 watts (24.6 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 8 and 9). 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 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.000 0.0 ST336607LC DC CURRENT/POWER vs THROUGHPUT (Single Ended) 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 I/Os per Second Figure 12. ST336607 DC current and power vs. input/output operations per second (SE) Power (watts) 5Vo lt A 12 Vo lt A Watts Amperes ST336607LC DC CURRENT/POWER vs THROUGHPUT (Low Voltage Differential) Random 8 Block Reads 1.400 14.00 5Vo lt A 12 Vo lt A 1.200 12.00 Watts 1.000 10.00 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 I/Os per Second Figure 13. ST336607 DC current and power vs. input/output operations per second (LVD)