On Mon, 3 Oct 2005, Luben Tuikov wrote:
> On 10/01/05 19:55, Alan Cox wrote:
> > On Gwe, 2005-09-30 at 19:53 +0200, Arjan van de Ven wrote:
> >
> >>that makes me wonder... why and how does T10 control linux abi's ??
> >
> >
> > Indirectly the standards do define APIs at the very least. A good
> > example is taskfile. ACPI methods (which we don't yet use) allow get/set
> > mode, get features on the motherboard ATA controller if you don't know
> > how to drive it. The objects they work in are taskfiles. No taskfiles,
> > no ACPI.
>
> Yes, that's true.
Luben,
Here was your entry point to state SCSI uses "taskfiles" in the packet
transport.
> Even more is true. Standards and specs define the
> _layering infrastructure_ which if implemented,
> allows for layer intersection.
>
> For example, if one needs to insert a SATL later just because
> the underlaying transport was found able to transport it,
> since the layering is well defined and _so_ implemented, it wouldn't
> be hard to interface antother well defined layer in.
>
> If, OTOH, things are conglomerated into a blob, just because
> the kernel engineers (not (storage) engineers per se) found _no_ current
> use of the layering infrastructure and separating the layers
> was found do add "more maintenance", then this will turn around
> sooner or later to bite back.
Not everyone has to be a "storage engineer", but a "storage engineer" must
be able to explain to any OS developer/engineer the scope of the transport
and work within the OS or explain why a change is required.
A lot of both has happened so ... to quote Elmo:
"ARE WE THERE YETTTTTTTTTTTTTTTTTTTT!"
This process is moving like rush hours in the SF-Bay area.
Cheers,
Andre
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