Seagate ST373554FC, ST336854FC manual Power dissipation, ST3146954FC

6.3Power dissipation

ST3146954FC

Typical power dissipation under idle conditions in 2Gb operation is 13.96 watts (47.6 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

		ST3146854FC DC CURRENT/POWER vs THROUGHPUT (2 Gb)
1.800				Random 8 Block Reads				20.00
1.600								18.00
1.400								16.00
								14.00
1.200
								12.00
1.000
								10.00
0.800								8.00
0.600								6.00
0.400								4.00
0.0	50.0	100.0	150.0	200.0	250.0	300.0	350.0	400.0

I/Os per Second

5Volt A

12 Volt A

Watts

Power (watts)

Figure 8. ST3146954FC DC current and power vs. input/output operations per second

Cheetah 15K.4 FC Product Manual, Rev. B 31