Disk activity 100%, Pieces scan to update databases

[xopok]

This is known for ages but is not addressed, I solved it with bcache:

Enable bcache on RaspberryPi 4 4G node

TL;DR; The process is fairly straightforward if you’re comfortable with the linux command line and the end result is fantastic! My setup: Raspberry pi 4 4GB; 8TB HDD connected to one of Pi’s USB3 port; old OCZ Vertex2 120G SSD connected to the second USB3 port. A few months ago I placed large database files orders.db and pieceinfo.db onto the SSD and --mount'ed them in the docker run command. It helped a bit with the HDD random reads but the initial and periodic disk scans are now the most a…