If it's Dell kit, I would go with their procedure.
However, before you do that make sure you have a complete backup
of your data!
It's always better to have a backup that you may not need to use, than the other way around.
I would put together a machine build document first (you should have one of these for your DR documentation).
- what OS (including revision)
- what components need to be selected
- what Kernel parameters need setting
- disk configuration (partition type, sizings, and mount options)
And anything else that may be relevant.
Ensure that you have the installation media available (just in case)