Re: RAID6: "Bad block number requested"

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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



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