Seagate ST3146854FC Cheetah 15K.4 FC Product Manual - Page 43

ST373454FC

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ST373454FC Typical power dissipation under idle conditions in 2Gb operation is 11.49 watts (39.21 BTUs per hour). To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 8). 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. Amperes 1.800 1.600 1.400 1.200 1.000 0.800 0.600 0.400 0.200 0.000 0.0 ST373454LC Specification random 8 block read, 2Gb 50.0 100.0 150.0 200.0 250.0 300.0 350.0 I/Os per Second 18.00 16.00 14.00 12.00 10.00 8.00 6.00 4.00 2.00 0.00 400.0 Power (watts) 5Vo lt A 12 Vo lt A Watts Figure 9. ST373454FC DC current and power vs. input/output operations per second Cheetah 15K.4 FC Product Manual, Rev. C 31

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Cheetah 15K.4 FC Product Manual, Rev. C
31
ST373454FC
Typical power dissipation under idle conditions in 2Gb operation is 11.49 watts (39.21 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure
8). 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 9.
ST373454FC DC current and power vs. input/output operations per second
ST373454LC Specification random 8 block read, 2Gb
0.000
0.200
0.400
0.600
0.800
1.000
1.200
1.400
1.600
1.800
0.0
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
I/Os per Second
Amperes
0.00
2.00
4.00
6.00
8.00
10.00
12.00
14.00
16.00
18.00
Power (watts)
5Volt A
12 Vo lt A
Watts