The EXT file system – Part 2

The still short version of what happens when you need locate a file on the system is the following;

• The SuperBlock is read, to collect information about the file system.
• Next to the Group Descriptor Table (After the SuperBlock on the disk), collection of information about the block groups.
• Once the block group that the file resides in is determined, the group descriptor table is used to locate where the Inode Table is.
• The Inode Table will point us to the block root directory entries.
• That is opened to locate the folder that contains the file we are looking for.
• Now we have the inode of the folder, we then determine the block group it belongs to (we use information from the SuperBlock for that).
• Then we go to that block group and get the location of the folder.
• Now we can open the block the contains the folder.