$ sudo rapiddisk -a 32
rapiddisk 7.2.0
Copyright 2011 - 2021 Petros Koutoupis
 **
Attached device rd1 of size 32 Mbytes
$ sudo rapiddisk -l
rapiddisk 7.2.0
Copyright 2011 - 2021 Petros Koutoupis
List of RapidDisk device(s):
 RapidDisk Device 1: rd1   Size (KB): 32768
 RapidDisk Device 2: rd0   Size (KB): 1048576
List of RapidDisk-Cache mapping(s):
  None