ora-01105 ora-03175

oerr ora 01105
01105, 00000, "mount is incompatible with mounts by other instances"
// *Cause: An attempt to mount the database discovered that another instance
// mounted a database by the same name, but the mount is not
// compatible. Additional errors are reported explaining why.
// *Action: See accompanying errors.

oerr ora 03175
03175, 00000, "parameter %s mismatch"
// *Cause: The value of the %s parameter was not the same in all instances.
// *Action: Check %s in all instances.

发现实例1未使用spfile，实例2使用spfile，原因是实例1$ORACLE_HOME/dbs下面有一个spfile.ora。

Behavior of Active Dataguard(ADG) When Apply Node Aborts/Crash (Doc ID 1613719.1)
Active Data Guard RAC Standby - Apply Instance Node Failure Impact (Doc ID 1357597.1)

_adg_instance_recovery=true