Seagate Cheetah 15K.5 FC ST373455FC - Manual (Page 40)

30 Cheetah 15K.5 FC Product Manual, Rev. D
ST3146855FC
Typical power dissipation under idle conditions in 4 Gbit operation is 10.56 watts (36.0 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
7). 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.
Figure 8. ST3146855FC DC current and power vs. input/output operations per second at 4 Gbit
ST3146855FC CURRENT/POWER vs THROUGHPUT (FC - 4GB)
Random 8 Block Reads
0.000
0.200
0.400
0.600
0.800
1.000
1.200
1.400
0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0 400.0
I/Os per Se cond
Amp
e
re
s
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
P
o
w
e
r (w
atts)
5Vo lt A
12 Vo lt A
Watts