You must install multipathing software on all Oracle
hosts that are attached to the system.
Multipathing support is available for Oracle hosts that use the
following software:
Oracle MPxIO / Solaris multipathing software
Subsystem device driver
(SDD)
VERITAS Volume Manager DMP
SDD dynamic pathing on Oracle hosts Oracle hosts support subsystem device driver (SDD) dynamic pathing when you add paths to an existing volume or when a new volume is mapped to a host.