Re: EIDE more reliable than SCSI?
Systemkennung Linux (linux@mailhost.uni-koblenz.de)
Thu, 21 Nov 1996 23:08:38 +0100 (MET)
> Systemkennung Linux <linux@informatik.uni-koblenz.de> writes:
> > In theory it's a good thing and one can demonstrate that the performance
> > increases significant with larger queues. But if the hostadapter for
> > some reason decides to execute first all commands for one target, then for
> > another the timing for feeding the CD writer with more data might become
> > very problematic.
>
> I might be mistaken, but wasn't there a priority level related to the
> SCSI id? Something along the lines that when two devices were
> competing for the bus, the one with the lower (higher?) id would win?
> Maybe changing the id's will have a noticeable effect.
You are talking about the bus arbitration. This is not what I've been
talking about. I'm talking about the internal queues that the SCSI
subsystem and intelligent hostadapters (DPT, I think BusLogic, too) are
maintaining.
Ralf