“FreeNAS, an open source NAS server, can convert a PC into a
network-attached storage server. The software, which is based on
FreeBSD, Samba, and PHP, includes an operating system that supports
various software RAID models and a Web user interface. The server
supports access from Windows machines, Apple Macs, FTP, SSH, and
Network File System (NFS), and it takes up less than 16MB of disk
space on a hard drive or removable media.“FreeNAS is free to use and deploy without cost. It’s an open
source project published under the BSD license. The software is
popular enough to have gotten more than 20,000 downloads last
month…”