Software Support

Managing The Physical Disk Power

Managing Physical Disk Power Using The QoS Option

To manage physical disk power through the QoS option:

1. Select the Customized Power Save Mode option.

2. In the Spin Down Configured Drives drop-down menu, select Enabled.

3. The Quality of Service (QoS) option is enabled.

Enter the Start Time and Time Interval to spin up.

4. Click Apply.

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Managing The Physical Disk Power

To Locate Manage Physical Disk Power In Storage Management

1. In the Server Administrator window, under the system tree, expand Storage to display the controller objects.

2. Select a controller object.

3. Click Information/Configuration on the controller Properties page.

4. Select Manage Physical Disk Power from the Available Tasks drop-down menu.

5. Click Execute.

Managing The Preserved Cache

The Managed Preserved Cache feature provides you the option to ignore or restore the controller cache data.

In the write-back policy, data is written to the cache before being written to the physical disk. If the virtual disk goes

offline or is deleted for any reason, the data in the cache is lost.

Data in the cache may also be lost in case of unintended cable or power failure. If such a failure, Storage Management

preserves the data written on the preserved or dirty cache until you recover the virtual disk or clear the cache.

This feature is available only on SAS controllers with firmware version 6.1 and later.

The status of the controller is affected by the preserved cache. The controller status is displayed as degraded if the

controller has preserved cache.