Re: [CentOS] Dangerous Software Raid instructions on Wiki

Alan Hodgson wrote:

Let me be even more clear - if your successor doesn't know what dd does, or what drives correspond to /dev/sda and /dev/sdb in the box he's working on, he has no business being within 10 feet of a production server without careful supervision.

What physically corresponds to /dev/sda and /dev/sdb isn't necessarily predictable these days. For example you can initialize a single drive as a volume with some common raid controllers, then swap that drive's position in the drive bays or reverse a pair and each will still show as the /dev/sd? device where it was initialized instead of what you'd expect from the current location.