On Thu, Apr 30, 2020 at 11:37:20PM -0400, Zygo Blaxell <ce3g8jdj@xxxxxxxxxxxxxxxxxxxxx> wrote:
> > My concern is merely that btrfs stubbornly insists a completely missing
> > disk is totally fine to write to, essentially forever :)
>
> That's an administrator decision, but btrfs does currently lack the tool
> to implement the "remove the failing device" decision. A workaround is
> 'echo 1 > /sys/block/sdX/dev/delete'.
Ah, I forgot to mention, the kernel did this automatically in my
experiment (as I described - the device node was gone).
The problem is the upper layers (lvm/dm and btrfs) didn't react to this
- dm becaus eit leaves error handling to the fs, and btrfs, because it
didn't have error handling other than "ignore an continue".
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