> > > > > The Sparc port has full support for point to point and full fc-al
> > > > > fibre channel. This is utilizing Sun's SOC and SOCAL adapter cards.
> > > > >
> > > >
> > > > What about Jaycor (JNI) cards ? They seem to simulate a SCSI
> > > > interface, but with up to 255 disks connected :-)
> > >
> > > 255? Strange. Does it have dual Fibre Channels? Even than that number is
> > > strange. AFAIK, AL topology limit is 126 devices arbitrating on the loop,
> > > and one has to be the HBA...
> > >
> >
> > You can stack more on top of the local loop entities if you have fabric
> > support.
>
> Yes, I know, but if you have fabric in (not supported yet by drivers/fc4), I
> don't know where 255 comes from. You could have thousands of disks behind
> fabric.
It's either an implementation or a protocol thingie. I don't know how
the JNI card does it but the Qlogic card finds out it's on a fabric by
trying to get the port name for loop id 0x7e (126). If this succeeds,
it uses the Simple Name Server protocol to try and get a list of WWNs to
select from- but the implementation limits the loop id (SCSI ID) to an
upper bound of 255 so you have to chose from this list the ones you want
to explicitly log into.
