Nytro MegaRAID Revision 1.7 Overview : Nytro MegaRAID Controller Features and Benefits : DDR Offload

DDR Offload

DDR Offloading or Protection is a method to protect the entire content of the controller’s main memory (DDR3) onto the Nytro Flash modules at the time of unexpected power failure. This method helps protect the data on RAM, from power failure to save the user data and controller’s metadata onto Nytro Flash modules, and to restore when the power gets restored. A SuperCap (capacitor) is used to provide power to the controller when the system power is lost for a short period required to vault the RAM content. All the Nytro Flash modules on the controller board have some space reserved for offloading. When the system power is back, the controller’s memory is restored from this offload space on the Nytro Flash module.

CAUTION  Do not hot plug the SuperCap when power is supplied to the controller card or if there is residual charge on the SuperCap, doing so might damage both the SuperCap and the controller board.