Power Dissipation; Figure 6. St336752 And St336732 Dc Current And Power Vs. Iops (Se); Figure 7. St336752 And St336732 Dc Current And Power Vs. Iops (Lvd) - Seagate ST336732LC Product Manual

Cheetah X15 36LP Product Manual, Rev. D
6.3

Power dissipation

ST336752 and
ST336732
For drives using single-ended interface circuits, typical power dissipation under idle conditions is 12.1 watts
(41.3 BTUs per hour).
For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 12.3
watts (42.0 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
0
ST336752 and
Figure 6.
1.800
1.600
1.400
1.200
1.000
0.800
0.600
0.400
0
ST336752 and
Figure 7.
50 100 150
I/Os per Second
ST336732 DC current and power vs. IOPS (SE)
50 100 150
I/Os per Second
ST336732 DC current and power vs. IOPS (LVD)
200 250 300
16.0
14.0
12.0
10.0
8.0
6.0
4.0
200 250 300
25
5V A
12V A
16.0
Watts
14.0
12.0
10.0
Watts
8.0
6.0
4.0
5V A
12V A
Watts
Watts