MegaRAID Storage Manager Online Help System

Configuration > Changing Power Settings

Changing Power Settings

The RAID controller includes Dimmer Switchâ„¢ technology that conserves energy by placing certain available online drives into powersave mode. In powersave mode, the drives use less energy, and the fan and the enclosure require less energy to cool and house the drives, respectively. Also, this technology helps avoid application timeouts caused by spin-up delays and drive wear caused by excessive spin-up/down cycles.

You can use the Power Settings field in MSM to choose whether to allow unconfigured drives or hot spares to enter powersave mode.

The Dimmer Switch technology is enabled by default.

When they are in the powersave mode, unconfigured drives and drives configured as hot spares (dedicated or global) can be spun down. When spun down, the drives stay in powersave mode except for periodic maintenance, including:

Follow these steps to change the powersave setting.

  1. Select a controller icon in the Physical tab or the Logical tab in the left panel of the MegaRAID Storage Manager main menu screen.
  2. Select Go To->Controller->Power Settings from the menu bar.
  3. The Power Settings dialog box displays, as shown in Figure 19.
    Figure 19 Powersave Mode Checkbox



  4. Click the checkbox Allow unconfigured drives to enter powersave mode and then click OK.
  5. The second Power Settings screen appears, as shown in Figure 20.
    Figure 20 Spin Down Time Delay Setting



  6. Enter the time delay in minutes before the unconfigured drives spin down automatically.
  7. After the specified time, the drives spin down automatically.
  8. Click OK.
  9. Your power settings are saved. In the Physical tab of the MSM main menu screen, the nodes for the unconfigured good drives that are spun down appear with - Powersave after their status.

DB09-000202-04  37857-02  Rev. E  October 2010
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