[SOLVED] SSDs with block-sizes < 4k?

[johannesl]

Hi,

out of curiostiy, because of a project I'm working on in my spare time, I wonder if there are SSDs, which can do fine granular, random reads of < 4Kb blocks / data.

I think the only possibility as of now are the Intel Optane Byte Addressable NVMs, which can be placed along side regular RAM, but which are capable of persisting data.

kind regards
Johannes

 

[RealBeast]

No, SSDs work differently. They write by page (a group of cells) and erase by blocks (and most blocks consist of many pages, say 32-256). Wear leveling controls where data goes to prolong drive life.

HERE is a more detailed description.

 

[johannesl]

No, SSDs work differently. They write by page (a group of cells) and erase by blocks (and most blocks consist of many pages, say 32-256). Wear leveling controls where data goes to prolong drive life.

HERE is a more detailed description.

Ah, sorry I confused blocks with pages...

 

[RealBeast]

Ah, sorry I confused blocks with pages...

I agree with your assessment that at present the only byte addressable NVM seems to be Optane.

 

[Maxxify]

Samsung's Z-NAND can operate with a 2KB page size.