this post was submitted on 14 Dec 2023
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Selfhosted

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[–] [email protected] 6 points 11 months ago (2 children)

What's TLC and SLC in this context?

[–] [email protected] 14 points 11 months ago (2 children)
  • SLC -> Single-Level Cell, i.e. 1 bit per cell
  • MLC -> Multi-Level Cell, i.e. 2 bits per cell
  • TLC -> Triple-Level Cell, i.e. 3 bits per cell
  • QLC -> Quad-Level Cell, i.e. 4 bits per cell

The more bits per cell you store, the more dense and therefore cheaper your flash chips can be for a give capacity. The downside is that it is slower and less reliable since you have to be able to write and read exponentially more voltage states per cell, e.g. 2 states for SLC, 4 states for MLC, 8 states for TLC, etc.

[–] [email protected] 2 points 11 months ago

Careful with this- since MLC just means multi, I've seen drives marketed as "3-bit MLC", i.e. TLC

[–] [email protected] 1 points 11 months ago