Hi, I just started to write dummy filesystem, The problem i'm facing is what value i will give to s_magic feild. As i will test my filesystem using loopback,so is that required to me or not. I just try it with the same number as of my root device but as expected the module is not loaded giving error device is busy. I'm pretty newbie to filesystems but I'm really trying to make a networked filesystems. So any further suggestions will help me further. Thanks Prasanna __________________________________ Do you Yahoo!? Y! Messenger - Communicate in real time. Download now. http://messenger.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/