How to move root partition from one disk to another?

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Issue

I have the root partition mounted on / dev/sdb1. I would like to move this partition on /dev/sda8. Can I do this kind of operation? If so, how can I do?
Want to move the root partition from /dev/sdb1 or /dev/sda8. No LVM configured, is it possible if we copy the data on new disk, re-install grub and edit the device.map file?

Environment

Red Hat Enterprise Linux 6.5

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