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12Gb/s MegaRAID SAS Software User Guide

March 2014
Chapter 5: The HII Configuration Utility
Managing Controllers
Follow these steps to set cache and memory properties:
1. To discard the preserved cache for the controller, highlight Discard Preserved Cache and press Enter.
NOTE If any foreign configurations exist, import them before discarding the
preserved cache. Otherwise, you might lose data that belongs with the
foreign configuration.
2. To change the interval, in seconds, at which the contents of the onboard data cache are flushed, highlight Cache
Flush Interval and press Enter. Specify a numeric value and press Enter.
3. If you want the controller to preserve cache because of missing or offline virtual drives (the cache is preserved
until the virtual drive is imported or the cache is discarded), highlight
Preserved Cache , and press Enter. Select
either Yes or No and press Enter.
4. Highlight Apply Changes and press Enter. The new settings are saved in the controller properties.
5.4.11 Running a Patrol Read
The following dialog appears when you select Patrol Read from the Advanced Controller Properties dialog.
Figure 89 Patrol Read
A patrol read operation scans and resolves potential problems on configured physical drives.
You can set the patrol read properties and start the patrol read operation, or you can start the patrol read without
changing the properties:
Follow these steps to set patrol read properties:
NOTE You can only view the properties/options supported by your
controller.
1. To select a mode for the patrol read operation, highlight Mode and press Enter. Select any of the following modes
and press Enter.
—
Auto : Patrol read runs continuously on the controller based on a schedule. You do not need to start it
manually.
—
Manual : Patrol read can be started or stopped manually.