Seagate Savvio 10K Product Manual page 37

ST936701SS in 3 Gbit operation
Typical power dissipation under idle conditions in 3Gb operation is 7.49 watts (25.56 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
6). 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.
ST936701SS DC CURRENT/POWER vs THROUGHPUT (3Gbit) Random 8 Block Reads
1 .800
1 .600
1 .400
1 .200
1 .000
0.800
0.600
0.400
0.200
0.000
0.0 50.0
Figure 8. ST936701SS (3 Gbit) DC current and power vs. input/output operations per second
ST936701SS in 1.5 Gbit operation
Typical power dissipation under idle conditions in 1.5 Gbit operation is 7.44 watts (25.39 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
6). 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.
ST936701SS DC CURRENT/POWER vs THROUGHPUT (1.5Gbit) Random 8 Block Reads
1 .800
1 .600
1 .400
1 .200
1 .000
0.800
0.600
0.400
0.200
0.000
0.0 50.0
Figure 9. ST936701SS (1.5 Gbit) DC current and power vs. input/output operations per second
Savvio SAS Product Manual, Rev. D
1 00.0 1 50.0 200.0
I/Os per Second
1 00.0 1 50.0 200.0
I/Os per Second
1 8.00
5Vo lt A
1 2 Vo lt A
1 6.00
Watts
1 4.00
1 2.00
1 0.00
8.00
6.00
4.00
2.00
0.00
250.0 300.0
1 8.00
5Volt A
1 2 Vo lt A
1 6.00
Watts
1 4.00
1 2.00
1 0.00
8.00
6.00
4.00
2.00
0.00
250.0 300.0
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