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Toshiba's 3D QLC NAND Could Reach 1000 P/E Cycles

posted by Fnord666 on Wednesday July 05 2017, @06:21PM   Printer-friendly
from the profit-earnings-ratio dept.

takyon writes:

While QLC NAND is predicted to have as low as 100 program/erase cycles (endurance), Toshiba has "targeted" 1000 cycles for its upcoming 3D QLC NAND products:

Toshiba last week announced its first 3D NAND flash memory chips featuring [the] QLC (quadruple level cell) BiCS architecture. The new components feature 64 layers and developers of SSDs and SSD [controllers] have already received samples of the devices, which Toshiba plans to use for various types of storage solutions.

[...] Besides [its] intention to produce 768 Gb 3D QLC NAND flash for the aforementioned devices, the most interesting part of Toshiba's announcement is [the] endurance specification for the upcoming components. According to the company, its 3D QLC NAND is targeted for ~1000 program/erase cycles, which is close to TLC NAND flash. This is considerably higher than the amount of P/E cycles (100 – 150) expected for QLC by the industry over the years. At first thought, it comes across [as] a typo - didn't they mean 100?. But the email we received was quite clear:

- What's the number of P/E cycles supported by Toshiba's QLC NAND?
- QLC P/E is targeted for 1K cycles.

Endurance miracle putting QLC on par with TLC, or idle talk about a product that won't be out for 1-2 years?

[Ed. note: If you're wondering what QLC NAND is, here's a quick primer.]

Additional Coverage: The guru of 3D

Original Submission

 
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  • (Score: 3, Informative) by takyon on Wednesday July 05 2017, @07:27PM

    by takyon (881) <takyonNO@SPAMsoylentnews.org> on Wednesday July 05 2017, @07:27PM (#535369) Journal

    There are numerous 3D TLC NAND SSDs out there. Typical warranty for TLC seems to be three [tomsitpro.com] years [anandtech.com]. If QLC NAND can somehow match the endurance of TLC, then it could work just fine.

    The massive capacity of 3D NAND SSDs can allow for overprovisioning to keep the capacity usable.

    If you don't need multiple drive writes per day, or if you treat it like write-once-read-many "cold storage", then there won't necessarily be a problem. Capacity/$ is what is desired for this storage tier, not stellar endurance.

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