vermaden said:@riku
Try that:
Code:# sysctl kern.geom.debugflags=16 # kldload geom_mbr # fdisk -B -b /boot/boot0 ad0 # sysctl kern.geom.debugflags=0 # kldunload geom_mbr
@Bunyan
fdisk(1) does not operate on filesystems ... no matter if mounted or unmounted.