Method, device, and system for starting plug-in type apparatus

A method for starting a plug-in type apparatus, comprising:

• sending an inquiry command, so as to trigger a driving device, to determine whether a plug-in type apparatus exists, wherein the inquiry command is used to inquire whether the plug-in type apparatus exists;
• when the plug-in type apparatus does not exist, receiving a media change command sent by the driving device, wherein the media change command indicates that the plug-in type apparatus does not exist currently;
• and
• when the plug-in type apparatus exists, receiving a media ok command sent by the driving device, and performing data exchange with the plug-in type apparatus, wherein the media ok command indicates that the plug-in type apparatus exists currently.

A driving device, comprising:

• a receiving unit, configured to receive an inquiry command sent by a host, wherein the inquiry command is used to inquire whether a plug-in type apparatus exists;
• a determining unit, configured to determine, according to the inquiry command received by the receiving unit, whether the plug-in type apparatus exists;
• a processing unit, configured to send a media ok command to the host when the determining unit determines that the plug-in type apparatus exists, wherein the media ok command is used to notify the host that the plug-in type apparatus exists currently, so that the plug-in type apparatus performs data exchange with the host;
• and send a media change command to the host when the determining unit determines that the plug-in type apparatus does not exist, wherein the media change command is used to notify the host that the plug-in type apparatus does not exist currently.

A communication apparatus, comprising:

• a sending unit, configured to send an inquiry command, so as to trigger a driving device, to determine whether a plug-in type apparatus exists, wherein the inquiry command is used to inquire whether the plug-in type apparatus exists;
• and
• a processing unit, configured to, when the driving device determines that the plug-in type apparatus does not exist, receive a media change command sent by the driving device, wherein the media change command indicates that the plug-in type apparatus does not exist currently;
• and when the driving device determines that the plug-in type apparatus exists, receive a media ok command sent by the driving device and perform data exchange with the plug-in type apparatus, wherein the media ok command indicates that the plug-in type apparatus exists currently.