ZFS is a very innovative file system….
ZFS is a combined file system and logical volume manager designed by Sun Microsystems. The features of ZFS include protection against data corruption, support for high storage capacities, integration of the concepts of filesystem and volume management, snapshots and copy-on-write clones, continuous integrity checking and automatic repair, RAID-Z and native NFSv4 ACLs. ZFS is implemented as open-source software, licensed under the Common Development and Distribution License (CDDL). The ZFS name was a trademark of Oracle[3] until September 20, 2011.[4]
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The name originally stood for “Zettabyte File System”[9] but today does not stand for anything.[10] A ZFS file system can store up to 256 quadrillion zettabytes (ZB), where a zettabyte is 270bytes.