to, 2022-02-10 kello 19:12 -0800, Gordon Messmer kirjoitti:
It *probably* will, but I think there are conditions under which it wouldn't. One SSD might be able to saturate your controller for reads. Interleaved writes will probably improve, but that might depend on how many cells are in each SSD, and how the SSD's controller spreads writes among them. If you're looking at QLC drives, it might depend somewhat on whether the 1TB drives together have more SLC cells than the 2TB drive has.
Interesting. I'm looking at the Crucial MX500 in either 2x1TB or 1x2TB configuration. They appear to be "TLC" drives rather than QLC or SLC, but I would imagine that both configurations would have more or less the same amount of cells.
Which is to say that if you haven't actually tested *your workload* on it, then there's some risk. You're probably not going to save much on the purchase, you're going to have slightly less reliable storage, and there's a small chance that performance won't be much better than a single drive.
I'm not concerned about reliability in this case, and the price is more of less the same, but if the RAID0 array isn't going to be any faster – and might even be slower – then I suppose there wouldn't be much point to it.