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Review of Linux Compatibility
The Qnap TS-421 is a 4 bay NAS server, which can be equipped with up to 4 TB SATA I/II HDD per bay. The Server has a
- 2.0 GHz CPU
- 1 GB RAM
- 2xUSB3 ports
- 2xUSB2 ports
- 2x eSATA ports
- 2x Gigabit Ethernet
Qnap provides a Linux based firmware for the TS-421, which supports HDDs with EXT3, EXT4 journaling filesystems. Furthermore, Qnap provides a bunch of software packages that can enhance the abilites of the system (Web server, mail server, SQL server, installation of Content Management Systems (Joomla, WordPress), and much more). See details on the Qnap homepage.
Linux compatibility is provided due to the support of several (open) protocols for data exchange: CIFS/SMB, AFP (v3.3), NFS (v3), FTP, FTPS, SFTP, TFTP, HTTP(S), Telnet, SSH, iSCSI, SNMP, SMTP, SMSC, TFTP.
It is even possible to install a standard Debian distribution on the TS-421. The installation steps are described at http://www.cyrius.com/debian/kirkwood/qnap/ts-41x/tips/.
An extensive review of the Qnap TS-421 NAS server can be found at http://www.linuxlookup.com/review/qnap_ts_421_nas_review.