I run one of my servers in RAID0, since the read / write performance is particularly important in this machine and the loss of data is not much more than an inconvenience.
After a restart yesterday, the system had problems with my XFS partition and I ran xfs_repair to try to fix it. In a way it worked, but the system was still acting strangely.
Anyway, I reinstalled Ubuntu (it was smooth) and after running the updates I got the following error:
cryptsetup: WARNING: the canonical device of / dev / md0 could not be detected
So I'm pretty convinced that md0 has gone wrong, but How can I find out which physical unit is md0?
Edit / Add: Configure the RAID in the Ubuntu Server installation configuration. I have not used mdadm.