I found the NAS case pictured googling the internet. I wrote to the company in China and did a direct purchase for around $160. Not sure if that was a good price or a not.
It was about 2-3 years ago. I will look at my emails as the company did want to sell their product here; but I noticed no real interest in the product.
They sold a similiar 4 drive case with even a smaller footprint. Personally I like the way the mini ITX board mounts on the side of the case.
That said the case was well assembled. It is very quiet. The main 1U server style power supply has two fans and the large two fans are very quiet.
I really never hear them.
You really don't need much to build a NAS box these days. The embedded products I have have small boards in them. That said using a standard PC motherboard will allow a bit more options relating to the OS of the NAS. The box / motherboard / SAS card above provide me with some 14 SATA ports which is really nice for such a small footprint device.
I am only promoting a DIY here if you choose to go into that direction. I have learned about NAS boxes though building another NAS in a full height tower with standard sized motherboard and a couple of drive cages mounted in it. Its sort of too big but has plenty of capacity.
The purchased NAS (3) boxes are 4-5 drive cage boxes with propietary linux (no names will be mentioned here). The embedded Wintel NAS is a 4 drive 1U box. Power supply is too loud and needs to be upgraded.
BTW the NAS boxes are only that; they are pure storage and serve no other functions today.
There is a Homeseer user out there that build a multi- motherboard tower that is doing multiple functions (NAS, Homeseer, et al).
Never seen this before; very unique low powered device.
I learned much from the above mentioned site and the Serve the Home website here:
http://www.servethehome.com/