Raid over Network

[Murat Koc]

Hi all,
I have 40 comps and have 2GB free partition each of them.
I want to manage them on one comp in one directory.
When I asked this question to linux-admin list, somebody told that there
is a solution on this list with subject raid over network.
If there is something like that, could anybody explain how I can do that?
Or recommend any doc.
Sorry for my english. 

                                   
                                                          MURAT KOC