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MegaRAID SAS Software User Guide Chapter 5: MegaRAID Command Tool
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Controller Property-Related Options
5.8.4 Flush Controller Cache
Use the command in the following table to flush the controller cache on the selected
controller(s). This option sends the contents of cache memory to the virtual drive(s). If
the MegaRAID system must be powered down rapidly, you must flush the contents of
the cache memory to preserve data integrity.
5.8.5 Set Controller Properties
This command sets the properties on the selected controller(s).
For example, for
{RebuildRate -val}
, you can enter a percentage between 0
percent and 100 percent as the value for the rebuild rate.
(The rebuild rate is the percentage of the compute cycles dedicated to rebuilding failed
drives.) At 0 percent, the rebuild is done only if the system is not doing anything else. At
100 percent, the rebuild has a higher priority than any other system activity.
NOTE:
We
recommend the default rebuild rate of 30 percent, and the default patrol
read rate of 30 percent.
Use the command in Table 41 to display the list of properties you can set for the
controller(s).
Table 40: Cache Flush on Selected Controller
Convention
MegaCli –AdpCacheFlush -aN|-a0,1,2|-aALL
Description Flushes the controller cache on the selected controller(s).