Which feature of solid-state storage provides the ability to detect and correct data errors during reads and over wear cycles?

Which feature of solid-state storage provides the ability to detect and correct data errors during reads and over wear cycles?

• A. Parity bit checking only.
• B. Cache memory management.
• C. Reduces memory capacity overhead.
• D. Error correcting code (ECC) detects and corrects errors across reads and wear cycles.

Answer: (D)

Error correcting codes in solid-state storage provide the ability to detect and correct data errors during reads and as the memory endures wear cycles. ECC adds extra check bits to stored data so that when you read it, the ECC logic can detect discrepancies and reconstruct the original bits. This is essential because NAND flash experiences errors as cells wear with program/erase cycles and over time due to retention loss; ECC can typically correct small numbers of bit errors and, with stronger codes, handle more complex error patterns, preserving data integrity across reads and throughout the device’s lifetime. Parity checks only flag that an error occurred and don’t reliably fix it, cache management doesn’t address data integrity, and reducing capacity overhead isn’t about error correction.

Error correcting codes in solid-state storage provide the ability to detect and correct data errors during reads and as the memory endures wear cycles. ECC adds extra check bits to stored data so that when you read it, the ECC logic can detect discrepancies and reconstruct the original bits. This is essential because NAND flash experiences errors as cells wear with program/erase cycles and over time due to retention loss; ECC can typically correct small numbers of bit errors and, with stronger codes, handle more complex error patterns, preserving data integrity across reads and throughout the device’s lifetime. Parity checks only flag that an error occurred and don’t reliably fix it, cache management doesn’t address data integrity, and reducing capacity overhead isn’t about error correction.