Data mapping comparison for improved synchronization in data storage devices

A data storage device, comprising:

• a memory device;
• and
• a controller coupled to the memory device, wherein the controller comprises:
• an update agent configured to update a first mapping portion and a second mapping portion, wherein:
• the first mapping portion and the second mapping portion correspond to a same data set;
• the second mapping portion is updated non-concurrently to updating the first mapping portion;
• the updating the first mapping portion comprises flipping a parity bit of one or more parity bits of the first mapping portion;
• and
• the updating the second mapping portion comprises flipping a parity bit of one or more parity bits of the first mapping portion;
• and
• a plurality of read agents configured to determine if the one or more parity bits of the first mapping portion matches the one or more parity bits of the second mapping portion.

A data storage device, comprising:

• memory means;
• and
• a controller coupled to the memory means, wherein the controller is configured to:
• maintain a first mapping portion and a second mapping portion, wherein:
• the first mapping portion includes a first number of first bits and a second number of second bits;
• the second mapping portion includes a third number of first bits and a fourth number of second bits;
• a bit of the second number of second bits is flipped when the first mapping portion is updated;
• and
• a bit of the fourth number of second bits is flipped when the second mapping portion is updated;
• determine if the second bits of the first mapping portion matches the second bits of the second mapping portion;
• and
• restore the first mapping portion and the second mapping portion from the memory means when the second bits of the first mapping portion is different from the second bits of the second mapping portion.