standby on SAN ? or use internal storage

[Rahul]

list, i'm a bit confused on whether to put the standby DB on the SAN storage or use the internal storage of the standby host !!!   config a two instances on primary server, data-files on SAN, hot standby db files on SAN too. standby instances for both primary on another machine   config b both primary on SAN, standby db files on the itnernal storage of standby machine   any thoughts  ?   TIA Rahul