Can Partitions be undone?

[Aastii]

I want to uinstall ubuntu to try it out. I ran it as an emulator and quite liked it so got them to send me a disk. I went through the install and chose create partition and it came up with something saying operation cannot be undone, so i cancelled before i decided to split my drive and make it the same as a couple of 80/90 GB drives and ask the question. So my question is as above

 

[fmw]

Partitions can be undone but you lose the contents of the partition when you do so.

 

[Aastii]

Cool thankyou. So if i make a 30GB partition on my 180GB hard drive for linux as i am only going to be using it for college work, browsing the internet and listening to music, all of said music is on my storage drive so no space needed for that) then i can.

If then say 6 months down the line i say, damn, this was so much easier with just vista, i can delete the partition, after backing up my college work, and it will go back to one whole 180GB hard drive with the 30GB that was used going back to the 180GB, and i WON'T lose anything from the 150GB that still had vista on it?

I am planning on leaveing the bigger chunk for vista because
1. Vista is bigger,

2. I am using the vista bit for gaming, so huge files like that need more space, files, documents a few programs don;t need hardly anything