How can i know the RAID Level configuration [on hold]

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http://stackoverflow.com – I am using the following OS . cat /etc/*release* cat: /etc/lsb-release.d: Is a directory Red Hat Enterprise Linux Server release 5.7 (Tikanga) I ran the below command on my linux server . cat /proc/mdstat The result i got is this : Personalities : unused devices: Please tell me how can i know the RAID Level i am using , thanks in advance . (HowTos)