Root file system in readonly mode

I have a system that has hardware raid and three LVM's. We recently had the motherboard replaced and since then the system will not book. All the disks report being in read-only mode.
If we boot with a CD into rescue mode then the disks are just fine and we can read and write. We have run fsck but it does not fix the problem. fsck reports that all is well. fstab does not have the file systems in readonly mode.... It simply says "defaults"

We thing somewhere there must be a flag indicating the LVM or disk is in readonly mode but we don't know where to look.

Any ideas?