Data processing method for AFA storage device to restore data protection capability and the AFA storage device utilizing the same

A data processing method for an all flash array storage device, wherein the all flash array storage device comprises a flash memory array, the flash memory array comprises a plurality of flash memories, the flash memories correspond to a plurality of logical aggregation units, each logical aggregation unit comprises a plurality stripes, each stripe comprises a plurality of storage units, and the storage units comprise a plurality of data units for storing data and at least one parity unit for storing protection information, and the data processing method comprises:

• sequentially performing a repair operation on the stripes comprised in one or more logical aggregation units that have been written with data in response to a detection result indicating that one of the flash memories has been removed from the flash memory array,
• wherein step of sequentially performing the repair operation on the stripes further comprises:
• recalculating protection information of the stripe according to content stored in a portion of data units of the stripe;
• and
• writing the recalculated protection information in one or more storage units of the stripe,
• wherein a number of data units in the portion of data units of the stripe is less than a number of all data units comprised in the stripe.

An all flash array controller, including:

• a memory device;
• and
• a microprocessor, coupled to the memory device and a flash memory array and configured to manage the flash memory array according to data stored in the memory device, wherein the flash memory array comprises a plurality of flash memories, the flash memories correspond to a plurality of logical aggregation units, each logical aggregation unit comprises a plurality stripes, each stripe comprises a plurality of storage units, and the storage units comprise a plurality of data units for storing data and at least one parity unit for storing protection information,
• when the microprocessor detects that loss of disk has occurred to the flash memory array, the microprocessor is configured to sequentially perform a repair operation on the stripes comprised in one or more logical aggregation units that have been written with data, and
• wherein in the repair operation corresponding to one stripe, the microprocessor is configured to recalculate the protection information of the stripe according to content stored in a portion of data units of the stripe and write the recalculated protection information in one or more storage units of the stripe, and
• wherein a number of data units in the portion of data units of the stripe is less than a number of all data units comprised in the stripe.