Seagate ST91000642SS Constellation SAS Product Manual - Page 35
ST9500430SS, ST9500431SS and ST9500432SS in 6 Gbit operation
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ST9500430SS, ST9500431SS and ST9500432SS in 6 Gbit operation Please refer to Table 2 for power dissipation numbers. To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 3.). 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. ST9500430SS CURRENT/POWER vs THROUGHPUT (SAS - 6.0GB) Random 8 Block Reads 0.600 6.00 0.500 5.00 0.400 4.00 Amperes 0.300 3.00 0.200 2.00 0.100 1.00 0.000 0.0 0.00 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0 180.0 I/Os per Second Figure 3. 500GB (6 Gbit) DC current and power vs. input/output operations per second For power details about SED vs. non-SED drive, please refer to section 7.8. Power (watts) 5Volt A 12 Volt A Watts Constellation SAS Product Manual, Rev. F 27