Seagate ST373454 Manual download pdf (Page 37)

Cheetah 15K.3 SCSI Product Manual, Rev. G 27

ST336753

For drives using single-ended interface circuits, typical power dissipation under idle conditions is 10.3 watts

(35.1 BTUs per hour).

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 10.5

watts (35.8 BTUs per hour).

To obtain operating power for typical random read operations, refer to the following two I/O rate curves (see

Figures 10 and 11). 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 10. ST336753 DC current and power vs. IOPS (SE)

Figure 11. ST336753 DC current and power vs. IOPS (LVD)

ST336753LC/LW DC CURRENT/POW ER vs THROUGHPUT (SE)

Random 8 Block Reads

0.400

0.600

0.800

1. 0 0 0

1. 2 0 0

1. 4 0 0

1. 6 0 0

1. 8 0 0

0.0 50.0 100.0 150.0 200.0 250.0 300.0 350.0

I/Os per Second

Amperes

4.00

6.00

8.00

10 . 0 0

12 . 0 0

14 . 0 0

16 . 0 0

18 . 0 0

Power (watts)

5Vo lt A

12 V o l t A

Watts

ST336753LC/LW DC CURRENT/POWER vs THROUGHPUT (LVD)