I have been trying to get a RAID5 partition going on a home file server with limited success. Thus far, I've managed to build the array, and I can mount it manually.
However, it creates the array at /dev/md127, whereas I was expecting to see it at /dev/md0.
Also, it doesn't automount, I'm assuming because I have to add the individual disks to /etc/fstab? It certainly doesn't like it when I try to mount /dev/md127. I can mount it using the GUI on the server, but commandline mount via ssh fails, anyway.
It's a software-based RAID array using mdadm.
Solved. Reformatted the partition using mkfs.ext4 and it showed up and mounted manually. Added to /etc/fstab and rebooted and automounting worked as it should.