Seagate ST35000415SS, ST35000414SS manual ST31000424SS and ST31000425SS in 3Gb operation

ST31000424SS and ST31000425SS in 3Gb operation

Please refer to Table 2 for power dissipation numbers.

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.

ST31000424SS CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB)

Random8 Block Reads

	1.0								10
	0.9								9
	0.8								8
	0.7								7	P
										o
s	0.6								6	w
										e
e										r
r
e										(
	0.5								5	w
p										a
m										t
A										t
	0.4								4	s
										)
	0.3								3
	0.2								2
	0.1								1
	0.0								0
	0	20	40	60	80	100	120	140	160
					I/Os per Second

5Volt A 12 Volt A

Watts

Figure 6. ST31000424SS & ST31000425SS (3Gb) DC current and power vs. input/output operations per second

Note. For power details about SED vs. non-SED drive, please refer to section 7.8.

ConstellationES Series SAS Product Manual, Rev. D 31