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Toshiba delivered a presentation on 4-bit QLC flash at FMS

Toshiba delivered a presentation on 4-bit QLC flash at FMS

Toshiba delivered a presentation on 4-bit QLC flash at FMS

Toshiba delivered a presentation on 4-bit QLC flash at FMS

 

At the Flash Memory Summit, Toshiba has given a presentation on 4-bit QLC flash, which should open up the possibility of SSDs that are around 100TB in the future. 

Unlike the typical MLC (Multi-level call) 2-bit and TLC (Triple level cell) 3-bit NAND that we see in modern SSDs Toshiba's QLC (quad-level cell) delivers 4 bits of information per memory cell, greatly increasing the amount of memory that can be fitted into a single memory die. 

In this presentation, Toshiba delivered a concept of a new PCIe Gen 3 SSD that was 100TB in size and had the ability to deliver 3GB/s reads, and 1GB/s writes while consuming a mere 9W of power and offer 3-6 PB of writes in its lifetime. 

Toshiba is said to be currently working on a product that is based on this technology, with industry analyst Stifel Nicolaus stating that the company has "been in early/high-level testing with hyper-scale consumers", meaning that QLC powered SSDs may be coming sooner rather than later to the enterprise market.  

  Toshiba delivered a presentation on 4-bit QLC flash at FMS

 

Traditionally when creating NAND that fits more data, bits, into a single cell the memory loses some performance and longevity, especially when it comes to workloads with heavy writes.  This is why not all modern SSDs use TLC, 3-bit, NAND today. It is fair to assume that this QLC NAND suffers from similar problems 

It is fair to assume that this QLC NAND suffers from similar problems, making these SSDs most suitable for workloads where data is not written to the drives very often but read consistently. An example for this kind of workload would be for Facebook and YouTube, where a lot of data is posted and requires quick access but is almost never deleted from their servers.  

 

You can join the discussion on Toshiba's QLC NAND on the OC3D Forums

 

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