As can be expected from a top-end model, the DS210+ has one eSATA as well as three USB 2.0 ports. The eSATA connector is located on the front panel for some reason. You can use these ports to connect external storage devices, printers, UPSes and Wi-Fi adapters.
The NAS can read from and write to external disks with FAT32, EXT2/3 and NTFS partitions. Multiple partitions are not supported; the NAS can only see the first partition. It can format disks in FAT32 and EXT3. You can increase the number of connected external devices using USB hubs. All external disks become accessible as individual shared folders with full access rights granted to the Users group. You can edit the access rights but your changes won’t hold after the device is reconnected. If you plug a disk into the front-panel port, you can then press the special button on the case to copy data from it into a folder specified in the settings.
An external drive with eSATA interface is no different from USB 2.0 ones in its way of working with the NAS. Top-end NASes from Synology support a special external unit to increase the number of HDDs to build RAID arrays from.
The DS210+ supports one or two printers using unidirectional data transfer.
If you’ve got several NASes on your network, you may want to establish an UPS server to keep track of an UPS from up to five NASes.
The list of compatible UPSes mostly contains products from APC. You can specify the time after which the NAS should switch into safe mode upon a power failure.
The NAS setup interface is available in multiple languages. The language is selected basing on your browser settings or is specified manually. It works on ports 5000 and 5001 by default (HTTP and HTTPS, respectively) but you can change these ports for some others. All services, save for Photo Station, require your logging in using your user name and password. A user is logged off automatically if not active for a specified period of time. There is one more security feature: the access is blocked automatically if a password guessing attempt is identified. This feature works for such services as SSH, Telnet, rsync, FTP, File Station and admin interface.
Synology NASes provide an advanced logging and monitoring system with notifications. The status page shows the firmware version, serial number, uptime, and the status of disk volumes, HDDs, and external devices. The second monitoring page shows the real-time level of CPU, memory, network and disk usage.
There are as many as eight event logs from a system log to a log of current connections. Thus, it is possible to learn what a user did on the FTP server or via File Station.
The administrator may receive notifications from the NAS via email or SMS (the latter feature requires registration for a paid service). The SMTP server may support authorization and/or encryption. You can also choose the code page for email messages.
The integrated clock can be synchronized via the Internet. It is used by such services as logging, power management, backup services, etc.
The DS210+ can work by a schedule. You can specify the time for the NAS to start up and turn off on each particular day of the week. The NAS can also be turned on by means of the Wake-on-LAN technology or automatically when it gets power supply.
The internal and external disks may be turned off if not accessed for a certain period of time. The fan can work in two modes but the manufacturer gives no details about those modes.
Of course, there are also options to update the firmware (by downloading a file with the new version from the manufacturer’s website) and manage the settings.
You can enable console access via Telnet and SSH, and SMTP support.