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#324761 - 28/07/2009 19:55 Backwards PCI slots in Proliant servers?
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31267
Loc: Seattle, WA
So, at work, we've got a pair of HP ProLiant servers, and like many modern machines, most of their slots are PCI-E and they've each got one legacy regular-PCI slot. Says so right on the sticker inside the case cover.

But when we look at these motherboards, it looks like each of their regular PCI slots are mounted backwards, whereas the PCI Express slots seem correct.

Here is a photo from the Wikipedia article about PCI Express, compared to a photo of one of our ProLiant boxes. Note the position of the divot, indicated by the red arrow in each photo.

Are these boxes truly backwards, or is this some oddity of the PCI standard we don't know about? Our PCI cards don't fit in this slot. (Well. They would fit if we took the bracket off the card. But we're afraid to try for fear of shorting things out if the slot is truly soldered into place backwards.)

(Wikipedia Photo First):


Attachments
wikipedia.jpg

proliant.jpg


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Tony Fabris

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#324762 - 28/07/2009 20:00 Re: Backwards PCI slots in Proliant servers? [Re: tfabris]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
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Bitt Faulk

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#324763 - 28/07/2009 20:00 Re: Backwards PCI slots in Proliant servers? [Re: tfabris]
peter
carpal tunnel

Registered: 13/07/2000
Posts: 4153
Loc: Cambridge, England
If you were on Wikipedia you were one click from the answer: http://en.wikipedia.org/wiki/Conventional_PCI#Card_keying

The upper photo is 32-bit 5V PCI, the lower one is 32-bit 3.3V PCI. Most cards are dual-voltage and have two notches in order to fit in either.

Peter

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#324764 - 28/07/2009 20:01 Re: Backwards PCI slots in Proliant servers? [Re: peter]
peter
carpal tunnel

Registered: 13/07/2000
Posts: 4153
Loc: Cambridge, England
Dayamn.

Peter

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#324765 - 28/07/2009 20:01 Re: Backwards PCI slots in Proliant servers? [Re: peter]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
Terse wins.
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Bitt Faulk

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#324766 - 28/07/2009 20:05 Re: Backwards PCI slots in Proliant servers? [Re: wfaulk]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31267
Loc: Seattle, WA
Too awesome. Thanks guys. smile

Your little race-to-post was a subject of much amusement to my coworkers here.

"They're my peeps", I tell them. smile
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Tony Fabris

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#324767 - 28/07/2009 20:06 Re: Backwards PCI slots in Proliant servers? [Re: tfabris]
drakino
carpal tunnel

Registered: 08/06/1999
Posts: 7868
Loc: Seattle, WA
I'm glad I checked the thread before digging up the same wikipedia article. Though I probably would have been distracted by trying to identify the Proliant model. Is it an ML300 series?
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Tom

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#324768 - 28/07/2009 20:07 Re: Backwards PCI slots in Proliant servers? [Re: drakino]
tfabris
carpal tunnel

Registered: 20/12/1999
Posts: 31267
Loc: Seattle, WA
Close. ML-150 G6.
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Tony Fabris

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#324769 - 28/07/2009 20:08 Re: Backwards PCI slots in Proliant servers? [Re: drakino]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
I woulda been faster, but for having been distracted by the "awesome" yellow connectors.
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Bitt Faulk

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#324770 - 28/07/2009 20:09 Re: Backwards PCI slots in Proliant servers? [Re: tfabris]
drakino
carpal tunnel

Registered: 08/06/1999
Posts: 7868
Loc: Seattle, WA
Ahh. Never supported the 100 series servers, due to them being rebadged HP servers after the merger. By the time they were fully integrated, I had moved onto storage.
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Tom

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#324771 - 28/07/2009 20:10 Re: Backwards PCI slots in Proliant servers? [Re: drakino]
wfaulk
carpal tunnel

Registered: 25/12/2000
Posts: 16706
Loc: Raleigh, NC US
You were a Compaq guy? Blurgh.
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Bitt Faulk

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#324774 - 28/07/2009 21:54 Re: Backwards PCI slots in Proliant servers? [Re: wfaulk]
drakino
carpal tunnel

Registered: 08/06/1999
Posts: 7868
Loc: Seattle, WA
I take no responsibility for anything Compaq did outside of the Proliant realm. Though amusingly, the site I worked at was an old DEC site, and most of my new hire paperwork still said Digital, 18 months after that merger.
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Tom

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