Seagate Cheetah NS 10K Product Manual page 39

ST3300955FC
Typical power dissipation under idle conditions in 4 Gbit operation is 7.62 watts (26.0 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
3). 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.
ST3300955 CURRENT/POWER vs THROUGHPUT (FC - 4GB)
1 .400
1 .200
1 .000
0.800
0.600
0.400
0.200
0.000
0.0 50.0
Figure 4. ST3300955FC DC current and power vs. input/output operations per second at 4 Gbit
Cheetah NS FC Product Manual, Rev. A
Random 8 Block Reads
1 00.0 1 50.0 200.0
I/Os per Second
1 4.00
1 2.00
1 0.00
8.00
6.00
4.00
2.00
0.00
250.0 300.0 350.0
5Volt A
1 2 Volt A
Watts
29