Figure 4.2 CD drive state transition diagram (error system)

Table 4.3 Error-related status explanation

state	description	internal state
〈RETRY〉	〈PLAY〉 if retry is successful, 〈ERROR〉 if it fails.	〈SEEK〉
〈ERROR〉	The state does not change until the next drive command is issued.	〈PAUSE〉
〈FATAL〉	Try to return by issuing a stop command. Transition to 〈STANDBY〉 if you can recover.	〈STANDBY〉

”Internal status refers to the status equivalent to the internal operation of the CD block.