When disk storage is used for NDMP backup or restore with NetApp, the NDMP Server on the NetApp cluster sends the data stream over the IP network to the DMA, and the DMA writes the data stream to its ...When disk storage is used for NDMP backup or restore with NetApp, the NDMP Server on the NetApp cluster sends the data stream over the IP network to the DMA, and the DMA writes the data stream to its own disk storage. For restores, the DMA reads the backup images from its disk storage, and sends the data stream over the IP network to the NetApp NDMP Server, and the NDMP Server calls restore to write the data stream to a volume.