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I have two identical Sun/Oracle Netra X4250s both with 16 x 4096MB DIMMs (as reported by memconf.pl, prtdiag and the ILOM)

On one, prtconf shows 64768MB but the other shows 57344MB

16 x 4096 = 65536 so where is the missing memory and why is one showing 7424MB less than the other?

Neither server shows any hardware faults.

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    What are the contents of /etc/system? Does it have a physmem entry? What's the output from fmadm faulty? Nov 4, 2015 at 1:58
  • /etc/system is the same across both boxes (verified with md5sum) and nothing about physmem. fmadm faulty comes back blank for both. I tried to post the contents of /etc/system but there were no line breaks
    – oliver CFC
    Nov 4, 2015 at 17:09
  • If you have console access and can reboot the boxes, what does the BIOS show for RAM? Nov 5, 2015 at 10:09
  • Unfortunately, I only got approval to reboot one and the BIOS does, indeed show 57GB. Looks like we'll be getting some hardware support out on site.
    – oliver CFC
    Nov 6, 2015 at 7:40
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    If you can shut down for a bit, I'd crack the box open and check to make sure the memory you think is there really is. And if the memory you expect is installed, reseat the memory modules. Nov 6, 2015 at 11:14

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