Seagate ST936701LC Specifications download pdf (Page 39)

Savvio SCSI Product Manual, Rev. C 29

6.3 Power dissipation

ST973401

For drives using single-ended interface circuits, typical power dissipation under idle conditions is 5.07 watts

(17.3 BTUs per hour).

For drives using low voltage differential interface circuits, typical power dissipation under idle conditions is 5.02

watts (17.1 BTUs per hour).

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

Figures 6 and 7). Locate the typical I/O rate for a drive in your system on the horizontal axis and read the cor-

responding +5 volt current, +12 volt current, and total watts on the vertical axis. To calculate BTUs per hour,

multiply watts by 3.4123.

Figure 6. ST973401 DC current and power vs. input/output operations per second (SE)

Figure 7.

ST973401 DC current and power vs. input/output operations per second (LVD)

ST973401LC DC CURRENT/POWER vs THROUGHPUT (Single Ended)

Random 8 Block Reads

0.000

0.200

0.400

0.600

0.800

1.000

1.200

1.400

0.0 50.0 100.0 150.0 200.0 250.0 300.0

I/Os per Second

Amperes

0.00

2.00

4.00

6.00

8.00

10 . 0 0

12 . 0 0

14 . 0 0

Power (watts)

5Volt A

12 V o l t A

Watts

ST973401LC DC CURRENT/POWER vs THROUGHPUT (Low Voltage Differential)