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Barracuda 36ES Product Manual, Rev. H
6.3
Power dissipation
ST336737
The drives typical power dissipation under idle conditions is 6.85 watts (23.4 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
7). 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.
1.2
1.0
0.8
0.6
0.4
0.2
0.0
Figure 7.
ST336737 DC current and power vs. input/output operations per second (LVD)
4
6
11
16
I/Os per Second
24
33
45
82
12
5V A
12V A
10
Watts
8
6
Watts
4
2
0
117
133
25
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