This is an old revision of the document!
Table of Contents
Raspberry Pi NAS: The X835 board
In January 2021 I purchased an HDD shield for the Raspberry Pi, it is the X835 model produced by suptronics.com. It is not so cheap: I had to pay about 32 Euros on Aliexpress for the bare board, without a power supply. The board can accomodate a 3.5 inches hard disk. I wish to build an home NAS with integrated multimedia center functions based on Kodi. The output will go to an HDMI attached 32 inches display.
Hard disk screws thread problem
The screws used to mount 3.5 inches hard disks are of the #6-32 UNC type (3.51 mm diameter, 0.79 mm thread pitch). Quite surprisingly the X835 board has four M3 threaded holes and provides four M3 screws (3.00 mm diameter, 0.50 mm thread pitch). It is a bad design to pair two threaded holes (the board and the hard disk), but it is really a madness to use screws in holes with different diameter and thread!
So my advice is to enlarge the holes in the board, so that you can pass #6-32 screws to properly attach the hard disk.
2.4 GHz WiFi and USB 3.0 interference problem
Long story short: the USB 3.0 signals cause interferences on the 2.4 GHz frequencies, so you can experience grave problems on WiFi connectivity or keyboard/mouse wireless dongles. People say that there are not problem on 5 GHz WiFi.