* Use [[ ... ]] condition check to reduce errors * bin/dash-manager: - Remove dash-merge-delta stage, this will be called in dash-create-recovery. - Call get_dash_target instead of using /dev/sda * bin/dash-create-recovery - Add dash-merge-delta before create recovery. - Remove redundant code pieces * bin/dash-create-disk - Remove redundant code pieces * lib/common.sh - Add get_dash_target to find first hard disk