Nexsan Assureon vs. EMC Centera

	Nexsan Assureon	EMC Centera
Self healing "RAIN" - Redundant Array of Independent Nodes
No single point of failure - clustered and redundant
Non-disruptive independent scalability
Scalable to multiple petabytes
Storage parity protection
Self-healing storage
Self-correcting nodes
CAS functionality
Object oriented storage with content and meta data separation
Can store all revision changes of content
Can store only the latest revision changes of content
File immutability -WORM functionality
Hash authentication to confirm a file has not been changed	MD5 + SHA1	MD5
Mirrored copies of data content and meta data
Auto-remote replication to an offsite location across a LAN		Option
File serialization confirms no files are missing
Stores and manages files by attributes / group for a defined period
De-duplication confirms no content has been duplicated
Auto-configurable for standard regulatory compliance
Single point deletion deletes all copies regardless of location
Automatic file management, repair and audit trail		3rd party w/ API
Secure universal, access, search and retrieval		3rd party w/ API
Content indexing stores content attributes in a fast search database	Option	3rd party w/ API
File meta data are stored in a fast search database		3rd party w/ API
Instantaneous file search, retrieval for restoration	Option	3rd party w/ API
Single local write when doing remote replication
Files can only be read using a special key		Option
Automatically migrate files to other storage like MO or Tape		Option
Crypto key scrubbing deletes keys so the file can never be read		Option

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