Key Features
End to End Data Path Protection
SMI’s FerriSSDs incorporate full data error detection with recovery engines to provide enhanced
data integrity throughout the entire Host-to-NAND-to-Host data path. The FerriSSD® data recovery
algorithm can effectively detect any error in the SSD data path, including hardware (i.e. ASIC) errors,
firmware errors and memory errors arising in SRAM, DRAM or NAND.

NANDXtend™ ECC Engine
Conventional SSDs employ standard BCH and RS ECC (error correction coding) engines for initiate
first-level correction using NAND shift-read-retries. In addition to this first-level error correction,
FerriSSDs also implement a highly efficient second-level correction scheme using an LDPC (low-densityparity check) code and a Group page RAID algorithm (a highly efficient redundant backup) to reduce potential dPPM at customer site while extending the service life of SSD.

IntelligentScan and DataRefresh to Enhance Data Integrity
SMI’s proprietary IntelligentScan function will activate automatically to
scan recharge, repair or retire the cell block (DataRefresh) according to the
host behavior and working environment (eg. ambient temperature). As a
result of the combination of IntelligentScan and DataRefresh, FerriSSD®
can effective prolong its service life much beyond typical NAND specifications.