A more modular and scalable storage back-end on new hardware
Improved file deletion and recovery processes
Advanced format identification and automated technical metadata extraction
Validation that content conforms to object types ("content models") known to the DRS
Links to format registries
Virus checking and monitoring
Richer preservation and technical metadata for use in preservation monitoring and planning
Identification and flagging of content needing preservation attention
Tracking and documentation of changes to content
Versioning of key metadata
Adoption of community-standard metadata schemas and packaging formats
Metadata replicated and preserved to the same standards as content in the DRS

Following launch in October 2013, these additional features

...

have been added:

Ability to edit metadata in bulk
Ability to delete and restore content in bulk
Ability to create a custom download set of objects/files
Improved support for linking to and searching within serials
Faceted search for collection and preservation management
Ability to deposit sensitive content into a separate secure storage area that meets Harvard's requirements for systems hosting high risk confidential information
Integration with the Electronic Archiving Service (EAS) to support DRS-archiving of email collections
Integration with DASH/ETD to support DRS-archiving of theses