# Managing Power-Save Settings

Dimmer Switch Technology

Powering drives and cooling drives represent a major cost for data centers. The MegaRAID Dimmer Switch (power save) feature set reduces the power consumption of the devices connected to a MegaRAID controller, which helps to share resources more efficiently and lowers the cost.

- Dimmer Switch 1 – Spin down unconfigured disks. This feature is configurable and can be disabled.

- Dimmer Switch 2 – Spin down hot spares. This feature is configurable and can be disabled.

Perform the following steps to manage the power-save settings.

1. In the Controller dashboard, select More Actions > Manage Power Save Settings.
   The Manage Power Save Settings dialog appears.
2. Select the Unconfigured Drives check box to let the controller enable the unconfigured drives to enter the Power-Save mode.
3. Select the Hot Spare Drives check box to let the controller enable the hot spare drives to enter the Power-Save mode.
4. Select the drive standby time using the drop-down list from the Drive Standby time: field.

   The Drive Standby time: drop-down list is enabled only if any of the check boxes above it are checked. The drive standby time can be 30 minutes, 1 hour, 1.5 hours, or 2 hours through 12 hours.

5. Click Finish to save the settings.

   A confirmation message appears.

Parent topic: Managing Controllers