FreeNAS is a popular free and open source NAS (network-attached storage) operating system. It is built with FreeBSD and uses OpenZFS for its file system. On their website, they state that FreeNAS is the #1 storage operating system with over 10 million downloads.
FreeNAS – Enterprise-Grade Features, Open Source, BSD Licensed
- FreeNAS is an operating system that can be installed on virtually any hardware platform to share data over a network. FreeNAS is the simplest way to create a centralized and easily accessible place for your data. Use FreeNAS with ZFS to protect, store, backup, all of your data. FreeNAS is used everywhere, for the home, small business, and the enterprise.
- ZFS is an enterprise-ready open source file system, RAID controller, and volume manager with unprecedented flexibility and an uncompromising commitment to data integrity. It eliminates most, if not all of the shortcomings found in legacy file systems and hardware RAID devices. Once you go ZFS, you will never want to go back.
- The Web Interface simplifies administrative tasks. Every aspect of a FreeNAS system can be managed from a Web Interface.
- File Sharing: SMB/CIFS (Windows File shares), NFS (Unix File shares) and AFP (Apple File Shares), FTP, iSCSI (block sharing), and more.
- Snapshots of the entire filesystem can be made and saved at any time. Access files as they were when the snapshot was made.
- Employ the Replication feature to send Snapshots over the network to another system for true offsite disaster recovery. — from FreeNas‘s home page.
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