Hi, Thank you all for your fast answers =). When I researched file systems, I was very curious about snapshots, which led me to NILFS. It would be interesting for me to implement it, however I'm not sure how useful it would be for other users. Additionally, I would also need to know how to integrate snapshot functionality into tracker (possibly paving way for ZFS for example). I would be most interested in something which would have somewhere to start from. That's why I'd have interest in ext2/3/4 and UFS. However, I also like to experiment things with higher flexibility (and sometimes an associated risk), which leads to other file systems too. I find ZFS fascinating, although I think it would be a complicated start. The same goes for Btrfs or Tux3 IIRC. I'm currently leaning toward implementing something along the ext2/3/4 path. Maybe NILFS I could implement later, outside of GSOC. Anyway, maybe I might not get as far as ext4, but either way, I am aiming for some write support, whichever I do. As far as I understood, there isn't write support for ext2 yet, is that correct? If so, I think that would be a nice place to start. Any opinions? Thank you again for all your help. I will start investigating all I can. Any doubts I have I'll probably post here (unless it's more relevant to post somewhere else). Are there mentors for such project for GSOC? Should I contact them before applications start? Sincerly, Janito _________________________________________________________________ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id=60969