On 11/06/18 16:06, James Bottomley wrote: > Well, this is the problem: a 4k logical (presumably 4k physical) drive > cannot be addressed in block sectors that are not divisible by 8. This > type of drive configuration is very unusual (although it was something > we tested years ago before the industry realised it had to ship drives > with 4k physical but 512 byte logical sectors because of the legacy > problem). I understood these drives were now becoming much more common, especially enterprise-grade drives. I know there were problems switching from 512/512 drives to 512/4096, but as you say I thought they were pretty much addressed. I think it must be a couple of years ago now though, that I heard (on LWN) enterprise drives were apparently switching over to 4096/4096. With NO 512 emulation fall-back. Cheers, Wol