ST373455LW/ST373455LC

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 8.49 watts (28.97 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 5). 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.

ST373455LC CURRENT/POWER vs THROUGHPUT (SCSI - LVD)

Random 8 Block Reads

 

1.800

 

 

 

 

 

 

 

18.00

 

1.600

 

 

 

 

 

 

 

16.00

 

1.400

 

 

 

 

 

 

 

14.00

Amperes

1.200

 

 

 

 

 

 

 

12.00

1.000

 

 

 

 

 

 

 

10.00

0.800

 

 

 

 

 

 

 

8.00

 

 

 

 

 

 

 

 

 

 

0.600

 

 

 

 

 

 

 

6.00

 

0.400

 

 

 

 

 

 

 

4.00

 

0.200

 

 

 

 

 

 

 

2.00

 

0.000

 

 

 

 

 

 

 

0.00

 

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 5. ST373455LC DC current and power vs. IOPS (LVD)

28

Cheetah 15K.5 SCSI Product Manual, Rev. J

Page 34
Image 34
Seagate ST373207LW, ST3146855LC, ST3146855LW manual ST373455LW/ST373455LC, ST373455LC DC current and power vs. Iops LVD