dzedward |
08-07-2013 02:48 PM |
CentOS 6.4 not recognizing all RAM?
This is a fresh install of CentOS 6.4 x86_64 - Minimal with Development Tools installed and wget installed. So far nothing else has been installed. The machine has 8gigs of RAM installed but
shows
Code:
total used free shared buffers cached
Mem: 3137 188 2948 0 6 82
-/+ buffers/cache: 99 3038
Swap: 3279 0 3279
Why does it only see half of the installed RAM? I've checked the box and it's all seated solidly. Is there a motherboard limitation here? Something else I can do to force it to see the rest? Thanks for any help, and if I need to provide any more info just let me know!
Update:
BIOS reports
Code:
Memory Installed 6144MB
Memory Available 6143MB
Memory Speed 800MHz
Memory Channel Mode Dual
Memory Technology DDR2 SDRAM
Code:
dmesg | head -n 25
Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 2.6.32-358.14.1.el6.x86_64 (mockbuild@c6b10.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Tue Jul 16 23:51:20 UTC 2013
Command line: ro root=/dev/mapper/vg_fms-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_fms/lv_swap rd_MD_UUID=f92a45ba:0b40b12f:78972b39:f598db0e rd_LVM_LV=vg_fms/lv_root SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_MD_UUID=f5fafd99:42d14092:ea0204a7:4b95b16a KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
KERNEL supported cpus:
Intel GenuineIntel
AMD AuthenticAMD
Centaur CentaurHauls
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 0000000000099c00 (usable)
BIOS-e820: 0000000000099c00 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 00000000cfe90000 (usable)
BIOS-e820: 00000000cfe90000 - 00000000cfee3000 (ACPI NVS)
BIOS-e820: 00000000cfee3000 - 00000000cfef0000 (ACPI data)
BIOS-e820: 00000000cfef0000 - 00000000cff00000 (reserved)
BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
BIOS-e820: 00000000fec00000 - 0000000100000000 (reserved)
DMI 2.5 present.
SMBIOS version 2.5 @ 0xF0BE0
DMI: Dell Inc. Vostro 400/0GN723, BIOS 1.0.11 01/31/2008
e820 update range: 0000000000000000 - 0000000000001000 (usable) ==> (reserved)
e820 remove range: 00000000000a0000 - 0000000000100000 (usable)
last_pfn = 0xcfe90 max_arch_pfn = 0x400000000
MTRR default type: uncachable
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