Almost a month away… My bad!
Here I go again, with a quick tip, that a passed today. Our kernel was ‘changed’ without advise and this began to happen:
ORA-15186: ASMLIB error function = [asm_init], error = [18446744073709551611], mesg = [Driver not installed] ERROR: error ORA-15186 caught in ASM I/O path
The solution was is basically update the asmlibs, that is based on kernel version. For RHEL, the solution is well decribed here:
http://www.oracle.com/technetwork/server-storage/linux/asmlib/rhel6-1940776.html
https://access.redhat.com/solutions/315643
Just to remember: After the kernel change, a relink of your Oracle Home is higly recommended.
Have a nice day!
Matheus.