Question: under Linux is it possible to reserve a block of the hard-disk such that the application can definitely append only write in that block? My understan

Question: under Linux is it possible to reserve a block of the hard-disk such that the application can definitely append only write in that block? My understanding is if you're developing a filesystem or working with persistent memory, assuming this kind of control may be necessary; otherwise you're probably just confused. That being said, it may well be that only appending helps the filesystem (eg. ext4) to keep the file contiguous. So if that's your angle, you probably want to learn more about your filesystem of choice. - https://en.wikipedia.org/wiki/Extent_(file_systems) https://en.wikipedia.org/wiki/Extent_(file_systems) https://en.wikipedia.org/wiki/Allocate-on-flush https://en.wikipedia.org/wiki/Allocate-on-flush https://unix.stackexchange.com/questions/349769/linux-dax-direct-access-details https://unix.stackexchange.com/questions/349769/linux-dax-di...