Users Guide

Physical Disk Power On Unconfigured Drives And Hot Spares
1. Select Enabled for the Spin Down Unconfigured Drives and Spin Down Hot Spares options.
2. Click Apply Changes. To exit and cancel your changes, click Go Back to Previous Page.
Managing Physical Disk Power Using The Customized Power Savings Mode
To manage physical disk power through the Customized Power Savings Mode:
1. Select the Customized Power Save Mode option.
2. Edit the remaining parameters on the Manage Physical Disk Power page. You can also configure the options in the QoS
section as described in the following section.
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.
Managing The Time Interval For The QoS Option
To manage the time interval for the QoS option at the virtual disk level:
1. In the Quality Of Service (QoS) page, select Enable Quality of Service Settings.
2. Set the Start Time.
The start time can range from 1 to 24 hours.
3. Click Apply Changes.
NOTE:
The Enable Quality of Service Settings option is enabled only if the Spin Down Configured Drives option is
enabled.
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.
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Controllers