Unix filesystem

hello all,
i want to know about the unix file system. about the boot block,super block,and how to access them ,all the geometry details of the file systemetc etc...
where can i find this??? i'l b happy if u can help me with a link!!!!!
thanx in advance

This may help you. Have a look at here also.

thanks a lot!!! that was very informative but iam looking for the basic unix files system(UFS). help me....