$ sudo rapiddisk --list
rapiddisk 6.0
Copyright 2011 - 2019 Petros Koutoupis
   
List of RapidDisk device(s):
 RapidDisk Device 1: rd0   Size (KB): 2097152
   
List of RapidDisk-Cache mapping(s):
 RapidDisk-Cache Target 1: rc-wa_md0   Cache: rd0  Target: md0 (WRITE AROUND)