Seagate ST318418N Product Manual - Page 35
Barracuda 36ES2 Product Manual, Rev. B, ST336918/ST318418
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Barracuda 36ES2 Product Manual, Rev. B 25 ST336918/ST318418 The drives typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour). To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see Figures 5). 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 5V A 21.0 12V A Watts 1.400 19.0 1.200 17.0 Amperes 1.000 0.800 15.0 Watts 13.0 0.600 11.0 0.400 0 50 100 I/Os per Second 9.0 150 Figure 5. ST336918/ST318418 DC current and power vs. input/output operations per second (SE)
![](/manual_guide/products/seagate-st318418n-product-manual-f54939b/35.png)
Barracuda 36ES2 Product Manual, Rev. B
25
ST336918/ST318418
The drives typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see
Figures 5). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the correspond-
ing +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour, multiply
watts by 3.4123.
Figure 5.
ST336918/ST318418 DC current and power vs. input/output operations per second (SE)
1.800
0
50
100
I/Os per Second
Amperes
150
0.400
0.600
0.800
1.000
9.0
Watts
11.0
13.0
15.0
1.200
1.600
1.400
5V A
12V A
Watts
17.0
19.0
21.0