There are restrictions to using regular VxFS files as Quick I/O files.
The name xxx::cdev:vxfs:
is recognized as a special name by VxFS only when the following conditions are met:
If the file xxx
is being used for memory mapped I/O, it cannot be accessed as a Quick I/O file.
An I/O fails if the file xxx
has a logical hole and the I/O is done to that hole on xxx::cdev:vxfs:
.
The size of the file cannot be extended by writes through the Quick I/O interface.