4 ms·

I'm pretty sure a decent chunk of this is related to the block granularity. NAND flash is a block-oriented structure; NOR flash and 3DXPoint are byte-oriented.

I'm pretty sure a decent chunk of this is related to the block granularity. NAND flash is a block-oriented structure; NOR flash and 3DXPoint are byte-oriented. There's a pretty different internal storage and ECC path for those two approaches. In particular, due to how it is accessed, 3DXPoint does not (as far as I know) run background erases and block GCs. This is a major help to its latency.

VinothS 5y ago
> 3DXPoint does not (as far as I know) run background erases and block GCs. Seems like they do need wear-leveling. https://twitter.com/stuntpants/status/1410679934515773441 https://twitter.com/stuntpants/status/1410679934515773441