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How do I check the status of my RAID array?

Solution Unverified - Updated 2014-10-31T18:59:45+00:00 -

Issue

How do I check the status of my RAID array? In Solaris, I used the metastat command, is there an equivalent command in Red Hat Enterprise Linux?
How to detect or determine raid level in Red Hat Enterprise Linux?
Is there a command which will detect hardware or software raid levels?
How can we indentify RAID5 and RAID10 luns which come from storage end.
Are there commands or utilities to find out the raid level of luns from the OS level?
How can I figure out the raid level my storage disks?

Environment

Red Hat Enterprise Linux 3 (RHEL 3)
Red Hat Enterprise Linux 4 (RHEL 4)
Red Hat Enterprise Linux 5 (RHEL 5)
Red Hat Enterprise Linux 6 (RHEL 6)
mdadm (software raid)
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