If you've been watching the NAS market closely, you may recognize the four-disk product from Promise we reviewed two years ago. The only difference is the color of the case: Patriot's NAS is white whereas its twin brother from Promise was black-and-silver. The design of the product box has also been partially borrowed from Promise, by the way. It looks like Promise has switched to working as an ODM instead of marketing its products under its own brand.
The seemingly internal power supply is actually a notebook-targeted 12V/6A model from FSP hidden in a bay at the bottom of the case. The advantage of this power supply is that it doesn't need a dedicated fan for cooling. The case stands on tall (1.5cm) feet and has a vent grid in the bottom panel for ventilation.
The case is made of matte white plastic except for the glossy piece on the right front edge. The NAS measures 15.3 x 22.8 x 18.9 centimeters. There is a door covering the disk bays from the front. It has two fine-mesh vent grids. They are easy to clean.
There are indicators to the right of the door, showing the status and activity of each HDD as well as LAN activity and NAS status. Below the indicators is a quick copy button with a built-in indicator. The Power switch can be found on the back panel.
Also on the back panel you can see a fan grid, a couple of USB 2.0 ports, one eSATA, a Gigabit Ethernet connector with indicators, a Reset button and a power supply input. You can access the fan for cleaning by unfastening four screws and taking the back panel off. The fan has a rather rare form-factor of 80x15 millimeters, so you may have problems finding a replacement. The speed of the fan is regulated automatically depending on temperature. The NAS is quiet most of the time.
The exterior design and manufacturing quality are very good overall except that home users would prefer to have a USB port on the face panel, especially as the quick copy button is also there. The white color of the Javelin S4 is going to be appreciated by Apple fans, I guess.