Expanding DX4000 HDD List

If you really want to do it you just download and run setupRST but while you may gain more raid functions you will probably lose some WD functions.

Read this thread here and it has a link

http://community.wd.com/t5/WD-Sentinel-Products/Expanding-DX4000-Complete-recovery-is-the-only-possibility/td-p/874105