Image forming apparatus including hard disk storage unit, and data display method

A data display method for displaying user registered data stored in a hard disk storage unit on a display unit, comprising:

• preparing a state in which at least a part of the user registered data stored in the hard disk storage unit is stored in a switch memory before power supply to the hard disk storage unit is started;
• starting the power supply to the hard disk storage unit;
• displaying the user registered data stored in the switch memory on the display unit after the power supply to the hard disk storage unit is started until operation preparation in the hard disk storage unit is complete;
• and
• switching a data access destination when the operation preparation in the hard disk storage unit is complete such that the user registered data stored in the hard disk storage unit, rather than the user registered data stored in the switch memory, are displayed on the display unit, wherein:
• the step of preparing the state in which at least the user registered data is stored in the switch memory is realized by storing a copy of specific user registered data that is stored in the hard disk storage unit and received by an input reception unit that receives a selection of the specific user registered data from among the user registered data stored in the hard disk storage unit,
• the specific user registered data stored in the switch memory by copying is displayed subject to a delay of a predetermined time that corresponds to a response time of the hard disk storage unit in the step of displaying the user registered data on the display unit, and
• the data access destination is switched in such a manner that the specific user registered data stored in the hard disk storage unit is displayed on the display in the step of switching the data access destination.