I discovered that one of our servers runs in a VMWware virtual machine and it has a software RAID.
The admin is not reachable during the next days.
I think a software-raid in a VM does not make sense. I think RAID is something that should be handled by the hypervisor, not inside the VM.
What could be a feasible reason do this?
cat /proc/mdstat Personalities : [raid10] md127 : active raid10 sde1 sdc1 sdb1 sdd1 209712128 blocks super 1.0 512K chunks 2 near-copies [4/4] [UUUU] bitmap: 0/2 pages [0KB], 65536KB chunk unused devices: <none>