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500GB models 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.
ST3500414SS CURRENT/POWER vs THROUGHPUT (SAS - 3.0GB)
1
0.9
0.8
0.7
s
0.6
r e
e
p
0.5
m
A
0.4
0.3
0.2
0.1
0
0
20
Figure 8.
500GB models (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.
34
Random 8 Block Reads
40
60
80
I/Os per Second
100
120
140
Constellation ES Series SAS Product Manual, Rev. E
10
9
8
P
7
o
w
6
e r
( w
5
a t
t s
4
)
3
2
1
0
160
180
5Volt A
12 Volt A
Watts
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