> On Oct 4, 2022, at 6:46 PM, yanliang lei <msdnchina@xxxxxxx> wrote: > > in the disk industry, hdd has 4kn and 512e, ssd has 4kn and 512e. > I want to know about postgresql database supports 4kn/512e in the hdd/ssd or not. > > thanks a lot! Completely irrelevant to Postgres, as it does not attempt to use raw devices. It uses normal files, on whatever file system you provide.