Is there anything special about making SSDs that the average person would not be able to do or is it a "if you can outsource PCB printing and maybe solder you can make one" situation?
[1] https://www.mouser.ca/datasheet/2/671/micron_technology_mict...
So using that flash, you could build something that is recognizably an SSD. But it would be almost entirely useless: too expensive and too small and slow for production use, and too far removed from the current state of the art to serve as a research platform for the most important challenges the SSD industry has been dealing with for the past several generations (error correction strategies for TLC/QLC, and SLC caching).
- I just picked one at random. I'm sure the bleeding edge is harder to get and datasheets are harder to get, but I wasn't trying to find the newest or best.
- the specific subthread here is about the diy-ishness of ssds vs. spinning rust, where the difficulties are of a fundamentally different kind. I feel like it goes without saying that a home built ssd is not going to perform to the level of mass production devices, the question was just can you.
Also, with these multiple level flash technologies (quad level is current tech, triple is still used in some SSD/NVMe) the read, write, and ECC algorithms are non-trivial to the point where last I checked even mainline Linux's raw flash driver support won't do anything beyond single level cell flashes (and very few new embedded designs are choosing raw parallel NAND flash, instead opting for things like eMMC or UFS which have built-in controllers to handle this).
The comparison here is that no matter how much you hunt on digikey you won't find a disk platter or drive head or any of the other precision machined parts that go into a hard drive (never mind putting them together and keeping dust out etc).
But they all rely on leaked manufacturer firmware production tools, not open source firmware.