Hi, I was wondering if anyone can help me set up raid 0 between 2 8GB USB drives. I've tried countless times and it never seemed to work as it claimed to have set up as raid 0, but the speed is the same and it is still 16GB and not 8GB. I have tried this ( https://www.studiopieters.nl/raspberry-pi-raid-storage/ ) guide as it looks more promising than the others, and I have hit a brick wall. When I try to run a command to put drives sdb1 and sdc1 in raid 0, this it what is says:
[email protected]:/home/pi# sudo mdadm --create --verbose /dev/md0 --level=stripe --raid-devices=2 /dev/sdb1 /dev/sdc1
mdadm: super1.x cannot open /dev/sdb1: Device or resource busy
mdadm: ddf: Cannot use /dev/sdb1: Device or resource busy
mdadm: Cannot use /dev/sdb1: It is busy
mdadm: cannot open /dev/sdb1: Device or resource busy
I am not using sda1 because that is used for something else. This has got to be the 100th time I'm trying and it never seems to work. The drives are literally no name, company bought with logo on it, and there r/w speed is about 4-5 MB/s. The reason I'm doing this is to run a Minecraft server and host the files on the two USB drives, because the server is being severely bottlenecked by the read speed. It crashes often due to not high RAM or high CPU usage, (running PaperMC), but when simply loading chunks? It seems as if that is the only reason why it suddenly hangs and crashes.