And also whether the kernel is reporting the true block size of the device; xref advanced format drives (what the drive reports and what the drive does can be t

And also whether the kernel is reporting the true block size of the device; xref advanced format drives (what the drive reports and what the drive does can be two different things), SSDs (minimum write size is typically much bigger than the reported block size), SANs. The true underlying block size can sometimes be determined by benchmarking the latency of different write sizes and also unaligned writes of different sizes.