A method to reduce the probability of bad writing of sd/tf card

Abstract

The invention discloses a method for reducing writing failure probability of an SD (Secure Digital) / TF (T-Flash) card. The SD or TF card is arranged inside a processor of a vehicle-mounted terminal. The method for reducing the writing failure probability of the SD / TF card comprises the following steps of step one, the processor of the vehicle-mounted terminal obtains real-time operating state information through an empty overloading sensor, a passenger flow sensor and a communication module of a vehicle and the state information of the vehicle is divided into priorities in different levels; step 2, the processing frequency of state information of levels which are corresponding to the priorities is set and the processing frequency is the frequency for writing the SD / TF card; step 3, the processor of the vehicle-mounted terminal performs classified process on the state information of the levels according to the processing frequency. The method for reducing the writing failure probability of the SD / TF card has the advantages of successfully solving the industrial problem that the SD / TF card is easy to be damaged through writing, greatly reducing the writing failure probability of the SD / TF card, reducing possibility of losing records possibly and getting a balance between the writing failure and the record losing due to the fact that the writing frequency is automatically adjusted according to event states and SD / TF card states.

Description

technical field [0001] The invention relates to a method for protecting an SD / TF card, in particular to a method for reducing the probability of SD / TF card being damaged. Background technique [0002] Nowadays, many car GPS terminals or navigation screens use large-capacity SD / TF cards to store big data information such as recordings. Generally speaking, large data information such as recordings are often written to SD / TF cards continuously for 24 hours. However, the quality of SD / TF cards on the market varies, and the number of writes to SD / TF cards is also limited. Using the file system to read and write SD / TF cards continuously for a long time can easily cause SD / TF cards to be damaged. Therefore, there is a direct proportional relationship between the life of SD / TF card, the probability of damage and the writing frequency of recording files. [0003] At present, the time interval for recording files to be written to SD / TF card is fixed. If the interval is small, the pro...

AI Technical Summary

Problems solved by technology

[0003] At present, the time interval for recording files to be written to SD / TF card is fixed. If the interval is small, the probability of SD / TF card damage is high, but the duration of recording files lost due to abnormal situations such as car reset is small; Long, although the probability of SD / TF card damage is reduced, but the length of the recording file lost under abnormal circumstances will be longer