I recently had to do some troubleshooting with a RAID 5 on Ubuntu Server (a software raid). I ended up removing everything and start from scratch with 2 new drives. So I took out 2 out of 4 drives, ...
I've currently put together a new system and part of that has been creating a software RAID 5 using 'mdadm' in Ubuntu Server. I successfully got to the point where I create the array using: sudo ...