Can't mount Old RHEL 6 Raid with new install of CentOS 7, now can't mount with original RHEL 6

[John Dawson <linux@xxxxxxxxxxxxxxx>]

I have a machine which had a drive with RHEL 6.X installed with a raid 
device setup on separate disk(s).  Installed a new hard disk in machine 
and installed CentOS 7.  CentOS 7 wouldn't mount the raid.  Put the old 
drive back in and now RHEL 6.X won't mount the raid.  Is the raid 
permanently hosed?  Can I get the data on it back? How? Thx.

JD

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