.TP
.I undo_dir
This relation specifies the directory where the undo file should be
-stored. It can be overriden via the
+stored. It can be overridden via the
.B E2FSPROGS_UNDO_DIR
-environemnt variable. If the directory location is set to the value
+environment variable. If the directory location is set to the value
.IR none ,
.B mke2fs
will not create an undo file.
This results in an fs_types list of "ext4, floppy". Both the ext4
subsection and the floppy subsection define an
.I inode_size
-relation, but since the later entries in the fs_types list supercede
+relation, but since the later entries in the fs_types list supersede
earlier ones, the configuration parameter for fs_types.floppy.inode_size
will be used, so the filesystem will have an inode size of 128.
.P
command-line option to
.BR mke2fs (8).
.TP
+.I auto_64-bit_support
+This relation is a boolean which specifies whether
+.BR mke2fs (8)
+should automatically add the 64bit feature if the number of blocks for
+the file system requires this feature to be enabled. The resize_inode
+feature is also automatically disabled since it doesn't support 64-bit
+block numbers.
+.TP
.I blocksize
This relation specifies the default blocksize if the user does not
specify a blocksize on the command line.
not fully initialized by
.BR mke2fs (8).
This speeds up filesystem
-initialization noitceably, but it requires the kernel to finish
+initialization noticeably, but it requires the kernel to finish
initializing the filesystem in the background when the filesystem is
first mounted.
.TP