System and method for preventing data corruption in solid-state memory devices after a power failure

A data preservation system for flash memory systems receiving a power supply and experiencing power failure thereof, the data preservation system comprising:

• a detection circuit in communication with the power supply;
• an auxiliary power source;
• an isolation circuit for isolating the auxiliary power source upon detection of a power failure by the detection circuit;
• and
• controller circuitry configured to complete pending flash memory write operations storing data from volatile memory into flash memory using the auxiliary power source.

A method of preserving data in flash memory systems experiencing a power failure, the method comprising:

• charging an auxiliary power source with a supply voltage;
• detecting a loss of power of the supply voltage;
• isolating the auxiliary power source;
• and
• utilizing the auxiliary power source to complete pending flash memory write operations storing data stored in volatile memory into flash memory.

A data preservation system comprising:

• a power detector;
• an auxiliary power source;
• an isolator adapted to isolate the auxiliary power source when the power detector detects a loss of power;
• and
• a data store configured to complete pending operations storing data into non-volatile memory powered by the auxiliary power source when the power detector detects a loss of power,
• wherein the operations storing data into the non-volatile memory are pending prior to the loss of power.

A method for storing data in a memory device, the method comprising:

• detecting a power reduction;
• decoupling an auxiliary power source upon detecting a power reduction;
• and
• completing pending operations storing data into non-volatile memory using the auxiliary power source,
• wherein the operations storing data into the non-volatile memory are pending prior to detecting the power reduction.

A memory device comprising:

• means for detecting loss of power;
• means for providing auxiliary power;
• means for isolating the memory device upon detection of loss of power;
• and means for completing pending operations storing data into non-volatile memory utilizing the auxiliary power,
• wherein the operations storing data into the non-volatile memory are pending prior to detecting the loss of power.