Revert "prepared support for raid 50 and 60"

This reverts commit 170498e977a1d3b408d09b2de5eb01bcd5480c84.
prepared support for raid 50 and 60
Revert "prepared support for raid 50 and 60"

This reverts commit fef1b0ca8ba9cdd34ff283ff3ae750e54ffbde58.