Like its predecessor, the TS-219P+ offers two disk bays with hot swap feature which may be relevant for a fault-tolerant mirror array or as an opportunity to quickly install new disks. We don't think it is a crucial feature for home users, though.
Besides individual disks, the TS-219P+ supports different disk array types: JBOD, RAID0 and RAID1. Creating a disk volume, you can specify the file system to use: EXT3 or EXT4. There are two array migration methods without losing data: when you transform a single disk into a mirror array and when you replace disks in a RAID1 array with larger ones.
The existing disk volumes can be used for iSCSI. LUN access can be restricted basing on the initiator name. CHAP is supported and you can also upgrade your iSCSI volumes by increasing their size. To make them accessible via LAN, you have to format your iSCSI volumes (as EXT3, EXT4, NTFS, FAT32 or HSF+) and create appropriate shared folders.
S.M.A.R.T. technology is used to monitor the status of the internal hard disks. Besides checking out their parameters and temperature, the NAS can run their S.M.A.R.T. tests by a schedule.
The TS-219P+ provides access to data via SMB/CIFS, AFTP, FTP, NFS, HTTP, and WebDAV protocols. It can integrate into a Windows domain or workgroup. It can also be a Master Browser, which may be useful for home LANs. A network recycle bin is supported for SMB and AFP.
AFP should be convenient for Mac OS users. Coupled with the support for HFS+ partitions on external disks and for the Time Machine utility, the TS-219P+ is very suitable for Apple machines.
The integrated FTP server is a handy way for Internet users to access files stored on the NAS. You can choose FTP ports, enable encrypted connections, and limit the server speed and the number of simultaneous connections. The FTP server supports passive mode and Unicode.
NFS is necessary for Linux users as well as for some LAN media players. You can specify the addresses of clients that are permitted to access a particular folder in the folder’s access rights.
For the rest of the protocols, a conventional username/password pair is used for access control. The administrator can require that users have only complex passwords. For each protocol there is a feature that blocks data access if a password-guessing attempt is detected. Users can be united into groups for easier management. Besides, you can restrict SMB/CIFS access to shared folders for certain hostnames or IP addresses. Recently, QNAP has implemented the opportunity to assign individual access rights to subfolders.
The TS-219P+ supports disk quotas. First you specify the overall quota for the entire disk volume and then the individual quotas for each user.
QNAP’s recent firmware versions also have other new features. Particularly, you can mount an ISO image of an optical disc to a new network folder, which may be a handy way of accessing databases or software distributions. The TS-219P+ also supports network resource aggregation (for SMB/CIFS): a single shared folder on the NAS may contain links to other (up to ten) shared resources on the same LAN.
The device connects to a LAN via a Gigabit Ethernet port which supports Jumbo Frames and IPv6. A DDNS client is available for making it easy to access the NAS from the Internet.
The SNMP implementation with the MIB taken directly from the NAS allows to integrate the latter into various network equipment management systems. UPnP and Bonjour protocols are supported for searching for the NAS on the network.
When a compatible Wi-Fi adapter (there are 802.11n devices on the compatibility list) is plugged into the USB port, the NAS can be accessed wirelessly. There is a page in the web-interface where you can specify clients that are permitted to access the NAS and those that are blocked.
Besides DDNS configuration, the NAS can set up UPnP routers to forward ports to its services.
You can also get help from the integrated MyCloudNAS wizard which will set up DDNS on its own server (you only have to choose a name; no registration is required) and will publish any services in a couple of mouse clicks. The wizard needs a compatible UPnP router.