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