The readfile-check checks files for readability. It returns the read speed as reporting data, too.
READFILE is the enclosing tag for all readfile entries.
0 or 1. If you don't define READFILE, no readfile check will run.
<READFILE>
<FILE>
<FILENAME>/nas/serverx/file_with_100MB</FILENAME>
</FILE>
</READFILE>
For every file, you want to check with READFILE, you define a FILE-pair.
The common XML tags as described in Section 9.8, “Tags Common to All Checks and/or Checkpoints”
As many as you like.
Look at READFILE