+
+option "min-complete" -
+#~~~~~~~~~~~~~~~~~~~~~~
+"Minimal number of complete snapshots to keep"
+int typestr = "num"
+default = "1"
+optional
+details = "
+ This option is only relevant if snapshots must be deleted
+ because disk space gets low.
+
+ dss refuses to remove old snapshots if there are fewer complete
+ snapshots left than the given number. The default value of one
+ guarantees that at least one complete snapshot is available
+ at all times.
+
+ If only <num> complete snapshot are left, and there is not
+ enough disk space available for another snapshot, the program
+ terminates with a \"No space left on device\" error.
+"