EXT2/3 Volume layout

• • • Bootsector, normally empty my contain GRUB or LILO (is at start of the 1st block)
    • Volume divided up in block-groups with identical layout, each having:
    • • A superblock copy, can be sparse meaning that not every group has a copy of the superblock
      • Group description data
      • Allocation bitmap for this group
      • Usage bitmap for the inodes
      • Fixed size Inode table for the group
      • Rest of group are data blocks