Flushing CD-ROM?

[Soeren Schmidt]

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