| 摘要 |
PROBLEM TO BE SOLVED: To protect the hard disk drive against breakage and theft by disabling a protection area to be written when the protection area is a read-only state or to be read when in a write-only state. SOLUTION: When a FORMAT command is not received, it is judged whether or not a microcontroller receives a WRITE command (step 350). When the microcontroller receives a WRITE command, it is checked whether or not an area requested to be written is a read-only protection area (step 355). If so, an alarm is given and then the WRITE command is disabled (step 345). When data requested to be written is detected, it is checked whether or not the area requested to be written is a read-only protection area (step 355); if so, an alarm is given and the data requested to be written is disabled (step 345). |
