http://kb.lsi.com/KnowledgebaseArticle16594.aspx
Two versions of CacheCade are currently available for MegaRAID Value and Feature Line controller products. The original CacheCade release supported read caching exclusively. The second release, CacheCade Pro 2.0, supports both read and write caching. The two products utilize different firmware versions:
Use of the original CacheCade hardware key with CacheCade Pro 2.0 firmware will result in instability, including configuration loss and inability to adjust volume properties. If you are currently using a CacheCade hardware key and planning an upgrade to the CacheCade Pro 2.0 software license, please follow the instructions below. Note that downtime is required to perform this major upgrade:
Disassociate all data volumes from the configured CacheCade volume.
Delete the CacheCade volume.
Power down.
Physically remove the CacheCade hardware key.
Download the CacheCade Pro 2.0 firmware image.
Power up.
Update the firmware to the latest CacheCade Pro 2.0 firmware.
Power cycle.
Activate your CacheCade Pro 2.0 software license.
Recreate and associate all data volumes with your CacheCade volume.
If you have already updated your controller to the CacheCade Pro 2.0 firmware and are currently using a CacheCade hardware key, your recovery steps are as follows:
Back up all data on configured volumes.
Clear all configurations.
Power down.
Physically remove the CacheCade hardware key.
Power up.
Activate your CacheCade Pro 2.0 software license.
Recreate all volumes and associate data volumes with your CacheCade volume.
