Fix repair replace broken failed RAID mirrored hard drive from proxmox hardware node HN MD0

** REBOOT NOT REQUIRED FOR HOT-SWAP DRIVE BAY **

cat /proc/mdstat

FROM SDB TO SDC:

dd if=/dev/zero of=/dev/sdc bs=512 count=1

sfdisk -d /dev/sdb | sfdisk --force /dev/sdc

mdadm --manage /dev/md0 --add /dev/sdc1

FROM SDC TO SDB:

dd if=/dev/zero of=/dev/sdb bs=512 count=1

sfdisk -d /dev/sdc | sfdisk --force /dev/sdb

mdadm --manage /dev/md0 --add /dev/sdb1

cat /proc/mdstat