On Mon, Jul 01, 2024 at 07:17:52AM +0200, Christoph Hellwig wrote: > NOWS is one of the annoying "0's based values" in NVMe, where 0 means one > and we thus can't detect if it isn't set. We can detect if it is set based on the namespace features flags, though. > Thus a NOWS value of 0 means > that the Namespace Optimal Write Size is a single LBA, which is clearly > bogus. Ignore the value in that case and don't propagate an io_opt > value to the block layer. Hm, why is that clearly bogus? Optane SSDs were optimized for single-sector writes.
