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Dell poweredge 2970 only reads 1/2 the memory

Posted on 2015-01-29
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Last Modified: 2016-11-23
I have a dell poweredge server and I've purchased 4- 8 gig memory sticks. I have ESXI server installed.  I have them placed in pairs.  Slots 1 and 2 and Slots 5 & 6 according to the specs.  However, when I boot the machine the bios is somehow disabling slots 5 & 6 so it's only reading 1/2 the memory. If you put the memory on once entire side of the slots its' not posting.
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Question by:WellingtonIS
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by:VB ITS
ID: 40577414
when I boot the machine the bios is somehow disabling slots 5 & 6 so it's only reading 1/2 the memory.
You would only install the modules in slots 5 & 6 if you have a second processor in your server.

Have you tried testing two modules at a time to ensure you don't have a faulty stick?

Also please list the part numbers of these memory modules to ensure that they're compatible with your server.
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by:WellingtonIS
ID: 40577444
I have a 2nd processor in here.  Sorry I s hould have stated that.  It only reads either 5 & 6 or 1 & 2 but it will not read the entire memory.  ANd it's 64 bit..  There's not place in the bios to change this either.  They are dell memory modules.
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by:VB ITS
ID: 40577548
Do you see the correct amount of memory in the BIOS? Can you also please post the part number of the memory modules anyway?
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by:PowerEdgeTech
ID: 40577633
Check your documentation:
http://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_poweredge/poweredge-2970_Owner%27s%20Manual_en-us.pdf

Memory must be installed in configurations of two, four, or eight DIMMs.
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Author Comment

by:WellingtonIS
ID: 40577718
No the memory is only showing 16 GB I have 32 GB - 4 - 8 gig memory sticks - I can't read the serial but it's DELL Memory 99L0254-001.ADOLF P950868-147399
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by:WellingtonIS
ID: 40577732
I'm doing everything according to that document - but it's only reading only 2 Dims
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by:PowerEdgeTech
ID: 40577747
What are the specs of the memory? Was it Dell memory specifically for the 2970? What is your BIOS version?
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by:WellingtonIS
ID: 40580004
As it turns out after  hours and hours of trying.  The memory is bad!  Thanks all for you input.
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by:VB ITS
ID: 40580069
Glad you managed to find the issue. FYI I did suggest trying two sticks at a time to see if you had a faulty module or two. Were all four sticks bad or only some? How did you come to that conclusion also?
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WellingtonIS earned 0 total points
ID: 40580141
OMG I kept switching the memory back and forth and each time I did that, I finally realized that there were 2 pairs each time that were not working. Since the memory only works in pairs there was no way to just test a pair.  And because it kept switching from Dimm 1 & 2 to Dimm 5 & 6 that was bad, I knew it couldn't be a motherboard issue.  Then I tired the memory in another machine that takes the same memory and it failed.  That's how I knew!
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by:VB ITS
ID: 40580150
Good thing you had that spare machine, otherwise you'd probably still be pulling your hair out now!
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by:WellingtonIS
ID: 40580158
For sure! :)
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Author Closing Comment

by:WellingtonIS
ID: 40670000
solved this myself
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