24 | Barracuda 36ES2 Product Manual, Rev. B |
6.3Power dissipation
ST336938/ST318438
The drives typical power dissipation under idle conditions is 8.0 watts (27.3 BTUs per hour).
To obtain operating power for typical random read operations, refer to the following I/O rate curve (see Figure 4). 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.
| 1.800 |
|
|
| 5V A |
|
|
|
|
| |
| 1.600 |
|
| 21.0 | 12V A |
|
|
| Watts | ||
|
|
|
|
| |
| 1.400 |
|
| 12.0 |
|
Amperes | 1.200 |
|
| 17.0 |
|
|
|
|
| ||
1.000 |
|
| 15.0 |
| |
|
|
|
| ||
|
|
|
|
| Watts |
| 0.800 |
|
| 13.0 |
|
| 0.600 |
|
| 11.0 |
|
| 0.400 |
|
| 9.0 |
|
| 0 | 50 | 100 | 150 |
|
|
|
| I/Os per Second |
|
|
