Re:Apple’s big test of data integrity
by sillywalk on Tuesday May 30, 2023 @06:02PM
(#36131571)
That was sort of what I was wondering, if the NAND controller has some extra Apple Stuff(tm) beyond standard ECC.
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I'm pretty sure that is the reason why support for Fusion Drives was abruptly ganked and punted out by a year.
The standard for SSDs goes far beyond the ECC used on DRAM. Every SSD controller designer will have their own proprietary scheme, often a simple and fast BCH that falls back on LDPC for higher error rates. The exact codeword sizes and other parameters of the codes are vendor-specific.