Overall Build of the Synology DS1817+
The enclosure looks like an elongated version of the DS1515+. It is matte-black except for its base. The front and back of the DS1817+ are made of plastic while the rest of the body is generally made of metal.
The front of DS1817+
From the front, the DS1817+ looks like the DS1515+ with additional drive bays. Above the drive trays are where the power button, system indicators (status, alert, LAN) are.
There is a USB 3.0 port on the lower right corner of the DS1817+ for you to easily attach a USB storage for Synology USB Copy.
The drive trays are designed to be easy to remove. A light press near the bottom edge of the tray releases the handle and unlatches the drive tray from the enclosure. Just grab the handle to slide the drive tray into or out of the DS1817+.
The provided keys lock the handle in place and prevents the drive tray from unlatching from the drive bays.
Behind the drive trays is the SATA backplane where hard disks are attached to. The two (2) 120mm fans, at the back, draws heat away from the hard disks and out of the enclosure.
The vented cutouts of Synology logo on both sides of the DS1817+ allow air to be drawn into the enclosure.
The back of the DS1817+
At the center of the DS1817+ are two (2) 120mm system fans. To the left are the power connector and Kensington lock slot. To the right is the PCIe slot for the new Synology accessories.
To the south, from left to right, are the eSATA port, four (4) Gigabit LAN ports, reset button, three (3) USB 3.0 ports and eSATA port.