From the troubleshooting steps that we have taken so far, we have collected quite a few key pieces of data. Let's walk through what we have learned and what we can infer from these findings:
mdadm command and the contents of
/proc/mdstat, we were able to determine that this system has two RAID devices
mdadm command and output of
dmesg, we were able to identify that both RAID devices are set up as a RAID 1 device. On top of that, we were also able to see that both RAID devices were missing a disk; both the missing devices were partitions from the
/dev/sdb hard disk.