By using RAID massive and changing him configuration in some cases they may be invisible at system re-installation. This is because on disk drivers the remain marks of RAID massive. For the problem solution they must to delete. This can do it by using utility – mdadm, which is avaliable in each Linux system. Firstable you need to boot in system via Live image one of Linux operating system and open console.
Stop massive work
mdadm --stop /dev/mdX
(mdX – name of device in your system)
To know name of device you can by using this command:
mdadm -A --scan
or
mdadm --detail /dev/mdX
Delete Superblock from each disk in massive:
mdadm --zero-superblock /dev/sdaX
mdadm --zero-superblock /dev/sdbX
Further note this:
mdadm --remove /dev/mdX
If after boot Live OS massive still mounted in system, you need to unmounted him before procedure of deleting itself starting.
umount -l /dev/md0
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