Figure 8. St318452 And St318432 Dc Current And Power Vs. Iops (Se); Figure 9. St318452 And St318432 Dc Current And Power Vs. Iops (Lvd) - Seagate ST336732LC Product Manual

26
ST318452 and
ST318432
For drives using single-ended interface circuits, typical power dissipation under idle conditions is 10.0 watts
(34.15 BTUs per hour).
For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 10.3
watts (35.18 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see
Figures 6 and 7). 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.
1.800
1.600
1.400
1.200
1.000
0.800
0.600
0.400
ST318452 and
Figure 8.
1.800
1.600
1.400
1.200
1.000
0.800
0.600
0.400
ST318452 and
Figure 9.
0 50 100
I/Os per Second
ST318432 DC current and power vs. IOPS (SE)
0 50 100
I/Os per Second
ST318432 DC current and power vs. IOPS (LVD)
Cheetah X15 36LP Product Manual, Rev. D
150 200 250
150 200 250
5V A
12V A
Watts
14.0
12.0
10.0
Watts
8.0
6.0
4.0
300
5V A
12V A
Watts
14.0
12.0
10.0
Watts
8.0
6.0
4.0
300