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You won't be able to buy a high capacity 5-bit PLC SSD until 2025 says WD

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The Landlord
Post time 2021-6-15 02:10:12 | Show the author posts only Reply Awards |Descending |Read mode
You won't be able to buy a high capacity 5-bit PLC SSD until 2025 says WD



Penta level cell (PLC) flash may be the next logical step for SSDs, but Western Digital for one doesn't think the technology is going to be ready for prime time until at least 2025 (via Tom's Hardware). The reason for the delay is because newer, more powerful controllers are going to be needed to make the shift to PLC worthwhile.

The most popular storage technology currently used by SSDs is triple-level cell (TLC) flash, which uses eight voltage levels to store three bits per cell. Quad-level cell (QLC) flash uses 16 voltage levels to store four bits per cell, but requires advanced error correction along with wear-levelling and overprovisioning to maximize endurance. pgslot

The 32 voltage levels needed for PLC flash will require even better error correction, which in turn requires faster processors at the heart of the controllers. This new flash technology will also require more overprovisioning, error correction, and wear-levelling to make the 25% increase in capacity worthwhile.


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