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Integrated Dell Remote Access Controller 9 Version 3.30.30.30 User's Guide

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Manage Preserved cache

The Managed Preserved Cache feature is a controller option which provides the user an option to discard 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 gets deleted.

The PREC Controller preserves the data written on the preserved or dirty cache in an event of power failure or cable disconnect until you recover the virtual disk or clear the cache.

The status of the controller is affected by the preserved cache. The controller status is displayed as degraded if the controller has preserved cache. Discard the preserved cache is possible only if all of the following conditions are met:
  • The controller does not have any foreign configuration.
  • The controller does not have any offline or missing virtual disks.
  • Cables to any virtual disk are not disconnected.

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