Just a quick thank-you to all who responded to my problem below.
The system is now up and running, and fortunately I am now out of the lab
for the next two weeks for a conference trip - so its the student's problem
if the SGI-spect link goes down again.
Some of your suggestions came in handy, but what made it work was
cable-swapping. We didn't have a *bad* cable - they had all been tested
between other computers and hubs on the local lab network, as had the hubs
and transceivers themselves. However, periodically when I changed cables
between the CPU/4 and SGI, the CPU/4 would boot.
The first time this happened, not being a fan of black magic, I disconnected
the cable and then reconnected it again - the CPU/4 would now not boot. So,
after a few more hours of this aggravation, the next time it worked, I slammed
the covers shut on the console and ran with it. Hardly an acceptable
solution, but its working for now. Now I just have to worry what happens in
a few weeks when the console has to move again (within the lab) to its final
resting place after renovations are complete!
Thanks
Ross
> >
> >Update - fully working AMX2 console moved from 400MHz spectroscopy magnet to
> >4.7T horizontal magnet = computer disaster.
> >
> >We ditched the AspectStation - which may have been a mistake as it would at
> >least talk to spect, and run rf-pulse-only expts. We now have an SGI O2 as
> >host computer. It has been freshly installed with IRIX 6.5 and XWIN-NMR2.6,
> >which the folks at Bruker assured me were compatible with the older AMX
> >hardware.
> >
> >After an entire day trying this, we still cannot make a permanent connection
> >to spect. It has been possible twice, for 5 mins each - once thru each of
> >the two ethernet ports on the SGI. (See below). So, this needs to be borne
> >in mind when I say we can almost never connect to spect.
> >
> >Or, more to the point, spect cannot make a connection to the 2nd ethernet
> >port of the SGI, therefore cannot boot up its diskless unix, therefore we
> >can't telnet/ping it.
> >
> >I have swapped the IP nos on the two ethernet ports ad infinitum. Which ever
> >port is labelled 'primary' and is assigned the local lab IP no, works fine.
> >I can always telnet elsewhere on the local net. But the spect connection
> >fails. I have plugged the local-lab-net cable into the ASP_ST2, and been
> >able to telnet succesfully from elsewhere in the lab, but am asked for a
> >login, and it wont accept any of the installed login/password on the system.
> >This makes me wonder if spect tries to log in the ASP_ST2, and is locked
> >out.
> >
> >The cables between SGI and spect have been swapped out, placed between the
> >SGI and other computers, and seen to work. Likewise, the hubs and
> >transceivers have been swapped over.
> >
> >I've been thru section 7 of the installation guide (what to do when telnet
> >spect doesn't work) a couple of times, to no success.
-- Ross Mair Staff Scientist Office Phone: (617) 495 7218 Harvard-Smithsonian Centre for Astrophysics Office Fax: (617) 496 7690 60 Garden St, MS 59, email: rmair@cfa.harvard.edu Cambridge, MA 02138 NMR lab at MIT (617) 252 7011 USA
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