C
HEETAH
15K.7 FC P
RODUCT
M
ANUAL
, R
EV
. E
24
6.3
P
OWER DISSIPATION
600GB model
Typical power dissipation under idle conditions in 4 Gbit operation is 11.58 watts (39.52 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). Locate the
typical I/O rate for a drive in your system on the horizontal axis and read the corresp5 volt current, +12 volt current,
and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 4.
ST3600057FC DC current and power vs. input/output operations per second
450GB models
Typical power dissipation under idle conditions in 4 Gbit operation is 10.24 watts (34.94 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). Locate the
typical I/O rate for a drive in your system on the horizontal axis and read the corresp5 volt current, +12 volt current,
and total watts on the vertical axis. To calculate BTUs per hour, multiply watts by 3.4123.
Figure 5.
ST3450857FC DC current and power vs. input/output operations per second
