End2End Protection

Introduction

End-to-End (E2E) Protection is a technology used in SSDs to ensure data integrity throughout the entire data lifecycle—from the moment data is written to the SSD until it is retrieved. SP Industrial E2E Protection safeguards data in transit using CRC (Cyclic Redundancy Check) and LDPC (Low-Density Parity-Check), depending on the interface, to detect and address any data mismatches during transfer.

When data is transmitted from the PC to the SSD, CRC code is generated to detect any transmission errors. The Host Controller verifies the CRC, and if an error is detected, it may request the data to be resent. Within the SSD, before the data is stored in NAND flash, it is encoded using LDPC error correction codes to protect against bit errors.

When data is retrieved, the SSD performs a complete End-to-End cycle within the controller, involving LDPC decoding, CRC validation, and internal processing through the Memory System, CPU, and Flash Controller, ensuring that the data returned to the PC is accurate and uncorrupted.

End-to-End Data Protection reduces the risk of data corruption, preserves data accuracy, and ensures reliable, secure storage—especially vital for mission-critical applications where data integrity is essential.