Does 3.5.3-1-ARCH from [testing] work wo/ errors? Does 3.4.9-1-ARCH? I didn't understand your first post.
Based on that output, you did not create a filesystem on the 4 disks. If you then move one of them back to your Arch system or if you just boot the Arch Live CD on the RHEL6 box and repeat the `lsblk -f`?
I boot to a "mini" arch install on another partition and run the command I listed on my real root every month or so. As I understand it, any badblocks identified are added to a blacklist and the OS will not use them.