Thanks to downright smart SnapShot technology backup and restore of a NAS’ data from an external storage source (or even on the NAS itself) is not only easy, but relatively fast… and fairly painless. Thanks to multiple RAID options (mirroring, RAIDZ, RAIDZ2, RAIDZ3, etc) the flexibility it offers is second to none. Thanks to OCD levels of error correction, data integrity worries are basically moot. Thanks to scrubbing options, bit-rot is a non-issue. Since it is a Copy On Write based system the original data is safe in case of unexpected power loss to the system. While starting to show its age (if BTFRS ever becomes truly stable it will arguably become the choice for NAS devices) the amount of data security it offers is second to none. The end result is ZFS makes hardware-based RAID controllers a non-starter for a good chunk of cases… and 99.999999 percent of home NAS devices. The Zettabyte File System has been called the “Billion Dollar Filesystem” as Sun wanted to create a truly next generation filesystem (and volume manager) that was not only flexible but self-healing. FreeNAS is based on FreeBSD and as such is incredibly robust, incredibly stable, and its implementation of Open ZFS is pretty much quirk free. In either case FreeNAS is the granddaddy of free NAS operating systems. It was created by the very last OG FreeNAS developer and should not be ignored just because it is not as well known. Basically, if you are using lower performance components, prefer a streamlined/stripped down version of FreeNAS… Xigmatek is probably right for you. We have grouped these two options into one heading… as Xigmatek is a branch of FreeNAS “before the bloat” (aka pre-iXsystems take over).
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