Figure 8. St318437 And St318417 Dc Current And Power Vs. Input/Output Operations Per Second (Se) 26 Figure 9. St318437 Dc Current And Power Vs. Input/Output Operations Per Second (Lvd); Figure 9. St318437 Dc Current And Power Vs. Input/Output Operations Per Second (Lvd) - Seagate ST336737LW Product Manual

26
ST318437
The drives typical power dissipation under idle conditions is 6.25 watts (21.3 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see
Figures 8 and 9). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the cor-
responding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour,
multiply watts by 3.4123.
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
Figure 8. ST318437 and ST318417 DC current and power vs. input/output operations per second (SE)
1.2
1.0
0.8
0.6
0.4
0.2
0.0
4
Figure 9. ST318437 DC current and power vs. input/output operations per second (LVD)
4 6 11 16
I/Os per Second
6 11 16
I/Os per Second
Barracuda 36ES Product Manual, Rev. H
23 32 43 77
24 33 45 75
9
5V A
8
12V A
Watts
7
6
5
4
Watts
3
2
1
0
108 126
9
5V A
8
12V A
Watts
7
6
5
4
Watts
3
2
1
0
82 82