Hi, just a heads up.
I have had some issues with the last two kernel releases. When a degraded array event occurs, I am unable to add a new disk back in to the array. This has been reported on Centos 6.1/6.2 and also RHEL 6.2 (see Bug 772926 - dracut unable to boot from a degraded raid1 array). I have found that I need to revert to kernel 2.6.32-131.21.1.el6.x86_64 in order to be able to add the new drive.
Cheers
Bill Maidment
IT Consultant to Elgas Ltd
Phone: 02 4294 3649