Seagate ST318203FC, Руководство по эксплуатации продукта

Страница: 33 / 82

Cheetah 18LP FC Product Manual, Rev. D 23
6.3 Power dissipation
ST318203FC
Typical power dissipation under idle conditions is 12.1 watts (41 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 corresp5
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by
3.4123.
Figure 7. DC current and power vs. input/output operations per second
ST39103FC
Typical power dissipation under idle conditions is 9.8 watts (33.5 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
8). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the corresp5
volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by
3.4123.
Figure 8. DC current and power vs. input/output operations per second
0.4
0 50 100
I/Os per Second
Amperes
150 200
0.6
0.8
1.0
1.2
11
13
Watts
15
17
1.4
1.8
1.6
5V A
12V A
Watts
0.400
0.200
0 50 100
I/Os per Second
Amperes
150 250
0.600
0.800
1.000
1.200
11
9
13
Watts
15
7
1.400
1.600
200
5V A
12V A
Watts