[yast-devel] Query on btrfs on SLES12

Hi, For OES, one of the product requires other than brtfs filesystem, but by default SLES12 configures btrfs, is there any way to change the default proposal to ext3 for root (/ partition through yast code or control.xml. Currently we chaning manully in the partitioning screen and going ahead, but this cannot be done on every single server. Can somebody help me in chaning the default proposal to ext3. Regards, Suresh