Voting and OCR – shared device
spfile – shared device – contains “*.” referring to all instances – or instance specific parameters
control files – shared device – * or instance name can be specific to affect instances
redo logs – read only sharing by all instances- each RAC instance has it’s own redo (referred to as a thread) writes take place to a dedicated instance thread by that instance only
undo segments – read only sharing by all instances – each RAC instance has it’s own undo
data files – shared device – ASM usually from 10gR2 forward
temp files – shared device – ASM