Sample /etc/mke2fs.conf file

# cat /etc/mke2fs.conf
[defaults]
 base_features = sparse_super,filetype,resize_inode,dir_index,ext_attr
 default_mntopts = acl,user_xattr
 enable_periodic_fsck = 0
 blocksize = 4096
 inode_size = 256
 inode_ratio = 16384

[fs_types]
 ext3 = {
  features = has_journal
 }
 ext4 = {
  features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize,64bit
  inode_size = 256
 }
 ext4dev = {
  features = has_journal,extent,huge_file,flex_bg,uninit_bg,dir_nlink,extra_isize
  inode_size = 256
  options = test_fs=1
 }
 small = {
  blocksize = 1024
  inode_size = 128
  inode_ratio = 4096
 }
 floppy = {
  blocksize = 1024
  inode_size = 128
  inode_ratio = 8192
 }
 big = {
  inode_ratio = 32768
 }
 huge = {
  inode_ratio = 65536
 }
 news = {
  inode_ratio = 4096
 }
 largefile = {
  inode_ratio = 1048576
  blocksize = -1
 }
 largefile4 = {
  inode_ratio = 4194304
  blocksize = -1
 }
 hurd = {
      blocksize = 4096
      inode_size = 128
 }