Seagate ST318436LW - Power Dissipation; Figure 3 C. DC Current and Power Vs. Input;Output Operations Per Second for ST318436 Drives; Figure 3 D. DC Current and Power Vs. Input;Output Operations Per Second for ST39236 Drives

Barracuda 18XL Product Manual, Rev. A 25
6.3 Power dissipation
To obtain drive typical operating random read (8 blocks) power dissipation at nominal voltages, refer to Figures
3c and 3d. The drive user can decide for themselves what number of I/O operations constitutes a typical num-
ber of I/O operations for their installation. Multiply Watts times 3.4123 to obtain BTUs per hour. Typical power
dissipation under idle conditions for LVD models is 6.9 Watts (23.54 BTUs per hour).
Figure 3c. DC current and power vs. input/output operations per second for ST318436 drives (LVD only)
Figure 3d. DC current and power vs. input/output operations per second for ST39236 drives (SE only)
0.0
4 6 11 16
I/Os per Second
Amperes
24 34 46 84 122 164
0.2
0.4
0.6
0.8
4
2
0
Watts
6
8
10
12
1.0
1.2
5V A
12V A
Watts
0.0
8122131
I/Os per Second
Amperes
46 63 84 135 161 165
0.2
0.4
0.6
0.8
4
2
0
Watts
6
8
10
12
1.0
1.2
5V A
12V A
Watts