Webbios Dimmer Switch - Lenovo ThinkServer RD330 Software User's Manual

Chapter 4: WebBIOS Configuration Utility
4.13

WebBIOS Dimmer Switch

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WebBIOS Dimmer Switch
A new drive in JBOD drive state is exposed to the host operating system as a
stand-alone drive. Drives in JBOD drive state are not part of the RAID configuration
because they do not have valid DDF records. The operating system can install and run
anything on JBOD drives.
Automatic rebuilds always occur when the drive slot status changes, for example, when
you insert a drive or remove a drive, so that a hot spare can be used. However, a new
drive in JBOD drive state (without a valid DDF record), will not perform an automatic
rebuild.
To start an automatic rebuild on the new JBOD drive, you must change the drive state
from JBOD to Unconfigured Good. (Rebuilds start only on Unconfigured Good drives.)
After you set the drive state to Unconfigured Good, the drive state information always
remains on the drive, and you can use the drive for configuration.
See Section 4.12.3.3, Troubleshooting Information
metadata.
This section helps you change the power-save settings using the Dimmer Switch
feature.
The power savings is done by reducing power consumption of drives that are not in use
by spinning down the unconfigured drives, hot spares, and configured drives.
Perform the following steps to change the power savings feature.
1. Select the Controller Properties option from the main WebBIOS screen as shown
in Figure 15.
The Controller Information screen appears as shown in the following figure.
MegaRAID SAS Software User Guide
for more information about DDF and