Rebuild Write Cache
Keywords: MegaRAID SAS SW UG

> Rebuild Write Cache

> MegaRAID firmware supports drive cache properties during a rebuild operation. The MegaRAID solution temporarily enables drive cache for the physical drive that is being rebuilt for the duration of the rebuild operation. Users can enable or disable this feature using the Mega CLI feature.

> The MegaRAID software automatically changes the setting for a drive that is being rebuilt. If the PD_CACHE for the rebuilt drive is already set, the firmware does not need to do anything extra.

> The firmware identifies and sets the cache policy of the drives whenever a rebuild operation starts and the catch policy is reflected in the event logs. The firmware also makes sure to flush the cache just before committing the drive to the disk group.

DB09000202-21, Rev 2.2, July 2015
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