FreeNAS is an embedded open source NAS (Network-Attached Storage) distribution based on FreeBSD. FreeNAS can be installed on Compact Flash/USB key, hard drive or booted from LiveCD.

Hardware Compatibility

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FreeNAS is based on FreeBSD and therefore hardware compatibility is based on FreeBSD which can be found here: http://www.freebsd.org/releases/7.2R/hardware.html