The invention relates to the technical field of
digital storage, and provides a method and a
system for recovering long-term storage failure of a mobile terminal, through the design of a built-in independent power supply, a startup disk can still supply power continuously when the mobile terminal is in a power-off state, and the limitation of traditional OTG (On-The-Go) equipment is broken through. The read-write state of the data block of the
flash memory chip is automatically monitored through the storage controller, and a health report is generated in real time; and when the early warning data block is detected, a
bidirectional communication protocol is triggered. In a data
backup link, a
boot disk adopts a hierarchical check mechanism to generate CRC codes for each data block for centralized storage, and meanwhile, an overall SHA-256 code is calculated and double-end synchronization is performed. And in the
recovery stage, the
backup integrity is ensured through SHA-256 code comparison, then the
data accuracy is verified block by block through CRC codes, and finally, the
backup file is automatically migrated to the nonvolatile partition. The seamless
closed loop from fault detection to
data recovery is realized aiming at the
system guidance problem after long-term storage of the equipment.