On 10/17/2016 12:20 PM, James Bottomley wrote:
That is not how the vendors implement this unfortunately. I dug into this
non-volatile cache log page with several disk vendors last year and they were
consistently not setting this to reflect that state.
We really need to have some ways to validate that our IO stack is
>properly and safely configured.
>I would love to see a couple of things:
>* having T10 & T13 report the existence of a volatile write cache -
>this is different than WCE set, some devices have a write cache and
>are battery/flash backed.
That's the non-volatile cache log page.
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