"vCACHE uses a patent-pending combination of DRAM and Flash memory, leveraging the spike-free latency of Violin 3200 Memory Arrays to accelerate enterprise applications while preserving current infrastructure, file systems and storage management software. vCACHE achieves this performance while supporting current NAS features such as snapshots and deduplication."

http://www.violin-memory.com/news/press-releases/violin-memory-accelerates-network-storage-with-first-multi-terabyte-nfs-cache/

e.Digital utilizes RAM....and were the first to cache from Flash....445 explains this process.

doni