[Discuss] ZFS error checking question

[Rich Pieri]

On Fri, 5 Aug 2022 18:31:40 -0400
Bill Bogstad <bogstad at pobox.com> wrote:

> Assuming for the moment that ZFS is talking directly to a storage
> device rather than some kind of virtualized environment, how does ZFS
> manage to avoid just getting back what might be in the RAM buffers of
> the device rather
> than reaching all the way down to the physical media (be it either
> spinning rust or
> flash cells)?

It can't.

When ZFS sends the flush signal and the drive returns confirmation, ZFS
expects the truth. If the drive lies then all bets are off.

All consumer class drives lie and some enterprise class drives lie.

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