[rescue] Cheapest Cray?
mcguire at neurotica.com
Mon Apr 26 03:25:37 CDT 2004
On Apr 26, 2004, at 4:08 AM, Bjvrn Ramqvist wrote:
>> In some cases, yes. The machines have backplanes, and CPU & memory
>> modules fit into slots. You can snag those modules (be they boards
>> like in the EL or big metal "subchassis" like in the J90) from one
>> machine to put 'em in the other. That's what I did with a J90 that I
>> bought a couple of years ago...used it to expand my existing one and
>> have some spare power supplies, backplane, and rack components. I
>> don't like buying vendor maintenance contracts. :)
> Is your J90 anywhere close to beeing maxed out, and/or are you
> planning on expanding it?
It is currently half-populated...eight CPUs, and it can take up to
sixteen. I would love to expand it, but processor modules are
expensive. It's a low priority for me right now, though, as the
machine is powered down. When I build my income back up to a nice
respectable level again, I'll be able to run it full time.
> How do they interconnect these "subchassies" in the J90?
Well they're modules that slide into a card cage of sorts. Picture a
very thick PCB surrounded by a big, thick metal shield...sorta turning
it into a metal box about the size of a pizza box, with a shitload of
pins (really...THOUSANDS of pins) on the end. This slides into a card
cage and plugs into the backplane.
So they're basically cards which are very heavily individually
Dave McGuire "PC users only know two 'solutions'...
Cape Coral, FL reboot and upgrade." -Jonathan Patschke
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