util-linux-ng v2.17.1 (new support for 4K-sector disks is useless in DOS-compatible mode. The fdisk command prints warning(s) when startup in DOS mode.)

[pp]

New feature by Karel Zak in util-linux-ng v2.17.1 :
fdisk:
   - supports new command line option "-c" to disable DOS-compatible mode from
     command line.

     The DOS-compatible mode is DEPRECATED and will be disabled by default
     in the next major release. Currently, the DOS mode is enabled by default
     for backward compatibility only. 

     The cylinders as display units are DEPRECATED. It's recommended to use
     "-u" command line option or "u" fdisk command and use sectors as display
     units.

   Note that the new support for 4K-sector disks is useless in DOS-compatible
   mode. The fdisk command prints warning(s) when startup in DOS mode.

more : http://thread.gmane.org/gmane.linux.file-systems/38367
more : http://lwn.net/Articles/322777/