Seagate ST336607LW ST3146807LC Model Product Manual PDF - Page 37
ST373307 DC CURRENT/POWER vs THROUGHPUT Low Voltage Differential, Random 8 Block Reads
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Cheetah 10K.6 SCSI Product Manual, Rev. D 27 ST373307 For drives using single-ended interface circuits, typical power dissipation under idle conditions is 8.4 watts (28.7 BTUs per hour). For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 8.7 watts (29.7 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 ST373307 DC CURRENT/POWER vs THROUGHPUT (Single Ended) Random 8 Block Reads 1.600 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.0 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 50.0 100.0 150.0 200.0 250.0 300.0 I/Os per Second Power (watts) 5Vo lt A 12 Vo lt A Watts Figure 10. ST373307 DC current and power vs. input/output operations per second (SE) Amperes ST373307 DC CURRENT/POWER vs THROUGHPUT (Low Voltage Differential) Random 8 Block Reads Power (watts) 1.600 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.0 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 50.0 100.0 150.0 200.0 250.0 300.0 5Vo lt A 12 Vo lt A Watts I/Os per Second Figure 11. ST373307 DC current and power vs. input/output operations per second (LVD)