Write cache and write sequence order

Let's say we have some binary file (.log), and sequence of write operations, for example log1, log2, log3 and each has some block size n (raw data).

question: can I be sure that log1,log2 and log3 sequences can be written in the correct order in ONE file, even if i have few cache levels (disk hardware and OS level)?

update very interested in what will be with records order (not with records) if we have software 开发者_Go百科or hardware failure (reboot or another reason).

update there can be some percent of write failures, but main question is: will write order stay correct?

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It depends on the file system. If you are doing something with a transactional file system (e.g. Transactional NTFS) then you get certain guarantees. If you aren't using a transactional file system, then you get far less guarantees about what happens in hardware failure situations.