Table of Contents
Advertisement
Cheetah 36LP FC Product Manual, Rev. C
6.3
Power dissipation
ST336704FC
Typical power dissipation under idle conditions is 12.0 watts (40.95 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.
1.800
1.600
1.400
1.200
1.000
0.800
0.600
0.400
Figure 7.
ST336704FC DC current and power vs. input/output operations per second
ST318304FC
Typical power dissipation under idle conditions is 9.6 watts (32.76 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.
1.800
1.600
1.400
1.200
1.000
0.800
0.600
0.400
Figure 8.
ST318304FC DC current and power vs. input/output operations per second
0
50
100
I/Os per Second
0
50
100
I/Os per Second
19
17
15
13
11
150
200
250
17
15
13
11
150
200
250
5V A
12V A
Watts
Watts
5V A
12V A
Watts
Watts
25
Advertisement
Table of Contents
