Comment by rbanffy
4 years ago
> The point is that with the M1 Macs SSDs the performance with fully flushing to disk is abysmal bad.
How sure are we the drives that flush caches more quickly are actually flushing the caches?
4 years ago
> The point is that with the M1 Macs SSDs the performance with fully flushing to disk is abysmal bad.
How sure are we the drives that flush caches more quickly are actually flushing the caches?
Good Point.
A simple test can be to see the degree of dataloss you can occur with a hard power off.
I think the author did that test for M1 Mac but idk. if they did the test with the other laptops.
But then the M1 Mac is slower when flushing then most SSDs out there and even some HDDs. I think if most SSDs wouldn't flush data at all we would know of that and I should have run into problems with the few docent hard resets I ran into in the last few years. (And sure there are probably some SSDs which cheap out on cache flushing in a dangerous way, but most shouldn't as far as I can tell).
We’d see data loss only if the power loss or hard reset happened before the data is actually flushed. After the data is accepted into the buffer there would be a narrow time window when it could occur. Also, a hard reset on the computer side may not be reflected on the storage embedded electronics.