Only the first 4 characters are required:
- TRIOT
- I/O trace without buffers or CCWs. This is TRRIOT+TRWIOT.
- TRBUF
- I/O trace with buffers and without CCWs. This is TRRBUF+TRWBUF.
- TRCCW
- I/O trace without buffers and with CCWs. This is TRRCCW+TRWCWW.
- TRACE
- I/O trace with buffers and CCWs for both reads and writes.
- TRRIOT, TRRBUF TRRCCW, TRRALL
- Apply only to read operations.
- TRWIOT,TRWBUF TRWCCW, TRWALL
- Apply only to write operations.