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Constellation SAS Product Manual, Rev. E 27
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.
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.
0.00
1.00
2.00
3.00
4.00
5.00
6.00
0.000
0.100
0.200
0.300
0.400
0.500
0.600
0.0 20.0 40.0 60.0 80.0 100.0 120.0 140.0 160.0 180.0
Power (watts)
Amperes
I/Os per Second
ST9500430SS CURRENT/POWER vs THROUGHPUT (SAS - 6.0GB)
Random 8 Block Reads
5Volt A
12 Volt A
Watts