> The Samsung 963 NVMe is an interesting device though because it has little capacitors on it that will flush the contents of that buffer when power is suddenly

> The Samsung 963 NVMe is an interesting device though because it has little capacitors on it that will flush the contents of that buffer when power is suddenly lost. But it still also just fills that write buffer and does not commit to disk when it said it did. As long as it's truly "past the point of no return" I don't particularly care where the data is stored (QLC, SLC, DDR+Capacitor). I just care that the confirmation happens after the data in no longer able to be lost. I'm okay with the first 512MB getting confirmation very quickly because it's going to volatile DDR RAM on the SSD package -- I just want the hardware to guarantee that there's enough stored energy to eventually write any confirmed data. This doesn't need to have a huge impact on performance. This goes for either a power loss event, or kernel panic. Either way, the hard disk should eventually store all confirmed data in a non-volatile way -- even if it's not yet stored non-volatile at the time of confirmation.