About using Veritas File System files as raw character devices
When VxFS with Quick I/O is installed, files may be accessed by the following ways:
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The VxFS interface treats the file as a regular VxFS file
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The Quick I/O interface treats the same file as if it were a raw character device, having performance similar to a raw device
Quick I/O allows a database server to use the Quick I/O interface while a backup server uses the VxFS interface.