What is this Alpha Rack ?

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leaknoil
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What is this Alpha Rack ?

Unread postby leaknoil » Fri Feb 18, 2011 5:19 pm


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pentium
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Re: What is this Alpha Rack ?

Unread postby pentium » Fri Feb 18, 2011 7:06 pm

That is a beast of a fan at the bottom.
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zmttoxics
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Re: What is this Alpha Rack ?

Unread postby zmttoxics » Fri Feb 18, 2011 8:06 pm

Looks... umm... interesting.
Stuff.

leaknoil
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Re: What is this Alpha Rack ?

Unread postby leaknoil » Fri Feb 18, 2011 8:09 pm

pentium wrote:That is a beast of a fan at the bottom.


You're not kidding. I'd be worried about wearing loose clothing near it.

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D-EJ915
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Re: What is this Alpha Rack ?

Unread postby D-EJ915 » Fri Feb 18, 2011 8:36 pm

reminds me of a squirrel cage haha
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SAQ
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Re: What is this Alpha Rack ?

Unread postby SAQ » Fri Feb 18, 2011 9:18 pm

It's an AlphaServer GS80, GS160 or GS320 (part for the last 2), think it's probably a GS80 (8 processors), but like the Origins the lines can blur. I think the blower is even bigger than the one used on SGI Predator racks, but DEC has always used pretty big fans on the large boxes.
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jan-jaap
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Re: What is this Alpha Rack ?

Unread postby jan-jaap » Sat Feb 19, 2011 7:46 am

SAQ wrote:I think the blower is even bigger than the one used on SGI Predator racks, but DEC has always used pretty big fans on the large boxes.

The Predator rack has a fan tray, similar to an O2K, with 4 Nidec Beta V fans in it. It's the Onyx1, and the gfx module of an Onyx2 rack that have the really large blowers.
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Re: What is this Alpha Rack ?

Unread postby Pontus » Mon Feb 21, 2011 8:03 am

Biggest blower I've seen was in early Alpha server.

It was jokingly called the Alpha with an AMD! (Air Moving Device)

It's a weird rack in the auction, doesn't look at all like the originals.
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SAQ
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Re: What is this Alpha Rack ?

Unread postby SAQ » Mon Feb 21, 2011 8:43 am

jan-jaap wrote:
SAQ wrote:I think the blower is even bigger than the one used on SGI Predator racks, but DEC has always used pretty big fans on the large boxes.

The Predator rack has a fan tray, similar to an O2K, with 4 Nidec Beta V fans in it. It's the Onyx1, and the gfx module of an Onyx2 rack that have the really large blowers.


Interesting, the IRIS x000 series has the annular blower. I wonder why they waffle between that and the fan tray.

VAX-6000 is supposed to be just about the ultimate - 3-phase blower motor on a very large fan.
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jan-jaap
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Re: What is this Alpha Rack ?

Unread postby jan-jaap » Mon Feb 21, 2011 12:41 pm

SAQ wrote:Interesting, the IRIS x000 series has the annular blower. I wonder why they waffle between that and the fan tray.

Couldn't say. Meanwhile, I found back a picture I took when I took the 4D/380 apart for cleaning and replaced the power cable between the PSU and the 'blinkenlights' panel. It had shorted at some point in history and suffered the full 250A @ 5V wrath of the PSU, which had left molten plastic and drops of copper everywhere :oops:

The fan tray is operated from the -12V rail of the PSU, and I think under most circumstances that's the only significant load on that rail. The blinkenlight panel is always like this until it's initialized by the PROM. Needless to say, that wasn't going to happen here :lol:

IMG_1338.med.jpg


Oh, I believe the SunFire V880 uses compatible fans. Probably a better chance to find one of those than a 'genuine SGI predator rack' fan.
Now this is a deep dark secret, so everybody keep it quiet :)
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Re: What is this Alpha Rack ?

Unread postby SAQ » Mon Feb 21, 2011 7:50 pm

Anyway, if you can house and feed it the Alpha GS80+ machines are kind of slick. They're similar to an Origin2000 in that they're expandable NUMAboxes.
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ramq
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Re: What is this Alpha Rack ?

Unread postby ramq » Mon Feb 21, 2011 11:55 pm

This seems to be the System Logic Cabinet - other half of a larger GS160 or GS320 system.
It's pretty pointless if you don't have an existing GS160 that you want to expand or have a System Power Cabinet in place already - and CABLES. All in all it's worthless on its own, since it relies on power bricks much like the Origin3000 series and probably PCI-expanders for base I/O.

I think this link might clear things up a little: http://h18000.www1.hp.com/products/quic ... 23_na.html
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