HP XP for Compatible Extended Remote Copy Software Licenses - Manual (Page 44)

remote control unit RCU
remote IO RIO
service information message SIM
simplex SMPL
serial number (also abbreviated as s#) S/N
storage subsystem identification SSID
secondary volume S-VOL
service processor SVP
synchronous sync
serial number (also abbreviated as S/N) s#
volume VOL
Acronyms and Abbreviations 44