You can enable and disable Cached Quick I/O for individual files by changing the cache advisory settings for those files.
To enable Cached Quick I/O for an individual file
$ /opt/VRTS/bin/qioadmin -S filename=ON /mount_point
For example, running qiostat shows the cache hit ratio for the file /db01/system.dbf reaches a level that would benefit from caching. To enable Cached Quick I/O for the file /db01/system.dbf, set the cache advisory to ON:
$ /opt/VRTS/bin/qioadmin -S system.dbf=ON /db01