I have a single hard drive and the OS (win7) and all my data & pics are on a single partition.
I want want to create a new partition and move my data and pics onto it, leaving the OS on the original partition.
Will Lightroom "know" that I've moved the folders and will the LR catalogue be intact?
No, Lightroom is not aware of any moves of your photos. What you need to do is move the photos using your operating system and then you would reconnect in Lightroom using these instructions: Adobe Lightroom - Find moved or missing files and folders
Unless you have some non-Lightroom reason for partitioning your hard drive, I guess I would advise you to not even bother. Of course, you may have non-Lightroom reasons for partitioning...
Thanks for your response.