[Discuss] ZFS error checking question

[bogstad at pobox.com (Bill Bogstad)]

On Mon, Jul 25, 2022 at 12:00 PM Rich Pieri <richard.pieri at gmail.com> wrote:

>
>
> ZFS reads back every write immediately as part of the end to end data
> validation. Frequent scrubbing is not necessary.
>

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)?

Bill Bogstad