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ZFS+ is a combined file system and logical volume manager software subsystem initially released under Common Development and Distribution License or CDDL license from Sun Microsystems with proprietary data deduplication features added by GreenBytes and subsequently made proprietary for a storage systems product.[1] GreenBytes owns the trademark on ZFS+, not to be confused with Sun Microsystems ZFS trademark.

It appears that ZFS+ has now been rebranded as GBFS (GreenBytes File System)[2]


GreenBytes created a storage appliance, called Cypress NAS Filer, originally based upon the Sun Microsystems x86-64-based Sun Fire X4500 platform, and bundled their ZFS+ implementation as a value-add technology. GreenBytes claims their ZFS+ technology can reduce storage power consumption by 50%.


  1. ^ "Sun Tussles With De-duplication Startup". PCWorld. July 14, 2009. 
  2. ^ "GreenBytes launches data deduplication for primary and secondary data storage". 14 Sep 2009.