Gv$iostat_file and v$iostat_file views

  Hi All!

I'm a little bit confused about the relation between Gv$iostat_file and v$iostat_file views.

I have a four node rac 11gr2 database.

There is ASM on shared disks; When i check the async I/O on datafiles the v$iostat_file and gv$iostat_file views show different results:

The instance id where i checked  is the 2.

select inst_id from gv$instance g, v$instance v where v.instance_name=g.instance_name;

   INST_ID

----------

         2

The query result from V$ views:

SQL> SELECT f.status,f.enabled,file# FROM V$DATAFILE F,V$IOSTAT_FILE I