It seems Sergey Matveychuk wrote:
> Why 5.1 flush acd0 on shutdown?
>
> -
> syncing disk, buffers remaining...
> done
> Uptime ...
> acd0: timeout waiting for cmd=e7 s=01 e=04
> acd0: flushing device failed
>
> The operating system has halted.
> -
>
> Well, it's cd-writer really, but there is no disk there any way.
The reason is that the "I support flush" bit in the cap page cannot
really be trusted, so I issue the flush command to all devices just
to sure that those that can flush does.
-Søren
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