I'm trying to build a NAS that has the following specifications
It is built in a wooden box
On the front and in the back is Plexglas, which has ventilation holes
On the back is a 92mm fan and a 250W power adapter mounted
Installer are 2 hard drives with 4 GB of storage space (SATA WD Blue) and connected to a USB hub (external power supply)
The USB hub is connected to a Raspberry PI 3 Model B with a cooling system (active and passive). The fan is a 40mm fan
When I start setting up the raid (mirroring), he falls into the status
of Clean, Degraded "after about 18 hours, and the creation of the raid
takes a long time (usually over 7 days)
The hard disks are partitioned in the GPT (no active partitions)
It does not seem to be a temperature problem, the temperature is always between 32-34 degrees
What is going wrong here?
Thank you for the help, I am grateful for every problem to solve the problem.