News FuzeDrive 1.6TB M.2 SSD Launches: Mixes SLC & QLC NAND for $259

Giroro

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Jan 22, 2015
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“Furthermore, we wanted to offer a new classification system that helps users understand the level of endurance they are buying"

In other words, their endurance rating is a lie, because they decided they could arbitrarily redefine TBW?

And since the capacity of the "SLC configured" QLC flash is 25% of its maximum, the capacity is probably also a lie.
 

Gillerer

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Sep 23, 2013
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“Furthermore, we wanted to offer a new classification system that helps users understand the level of endurance they are buying"

In other words, their endurance rating is a lie, because they decided they could arbitrarily redefine TBW?
I believe the new classification system is the "Gold/Silver/Bronze Class Endurance", as listed on their indiegogo page. The 1.6TB gets Gold, 900GB gets Silver, and all regular QLC drives are Bronze.

And since the capacity of the "SLC configured" QLC flash is 25% of its maximum, the capacity is probably also a lie.
Assuming 2048 GiB (2199.02 GB) raw QLC NAND:
  • 128 GB = 119.21 GiB pseudo-SLC consumes 512 GB = 476.83 GiB worth of QLC
  • 1472 GB = 1370.91 GiB in QLC
  • 128+1472 GB = the advertised 1600GB capacity
  • total 1984 GB = 1847.74 GiB raw QLC consumed
  • leaves 200.26 GiB or 9.78% (of 2048 GiB) for over-provisioning.
Assuming 1024 GiB (1099.51 GB) raw QLC NAND:
  • 24 GB = 22.35 GiB pseudo-SLC consumes 96 GB = 89.41 GiB worth of QLC
  • 876 GB = 815.84 GiB in QLC
  • 24+876 GB = the advertised 900GB capacity
  • total 972 GB = 905.25 GiB raw QLC consumed
  • leaves 118.75 GiB or 11.60% (of 1024 GiB) for over-provisioning
Checks out and seems reasonable to me.

(Pseudo-)SLC has less need for over-provisioning, and the drive can probably lower the QLC write amplification too, sinceit can group writes into large chunks when migrating data from SLC to QLC. Leaving often overwritten data in SLC will be a huge boon here.
 
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