help. 4G ram serverCentOS 4.2_x64 only recognize 3.1G?

Hello,

I just have this new server installed with CentOS 4.2_x64, in BIOS it shows 4G RAM, but boot into the system shows only 3.1G ram.

[root@localhost ~]# cat /proc/meminfo
MemTotal: 3347636 kB
MemFree: 2411308 kB
Buffers: 64472 kB
Cached: 780700 kB
SwapCached: 0 kB
Active: 413512 kB
Inactive: 444192 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 3347636 kB
LowFree: 2411308 kB
SwapTotal: 2031608 kB
SwapFree: 2031608 kB
Dirty: 67564 kB
Writeback: 0 kB
Mapped: 21264 kB
Slab: 65356 kB
Committed_AS: 33424 kB
PageTables: 1152 kB
VmallocTotal: 536870911 kB
VmallocUsed: 263876 kB
VmallocChunk: 536605599 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 2048 kB


Is there anything wrong? How could I fix this problem? Thanks

Either the memory is bad ... or something is using the rest of the memory. The video card shouldn't be using 900 MBytes.

What does the bios say during bootup?

This has nothing to do with DirectAdmin, and I've moved it to Off-Topic Discussion.

Jeff

Yeah first thing I look at is a built in video card sucking up some RAM but I have never seen one use that much.

Run a memory scanner on it or look for other things you can disable in the bios such as a sound card etc.

Being that I am still getting back on my feet with Linux I have to ask. Is there something you need to compile into the kernel to get it to use 4GB of RAM. I remember we used to have to mess with lilo I think to get it to recognize certain amounts of memory with Red Hat V4

Let us know what you find out.

BIOS shows normal, 4096M memory... but after boot into centos, it only left 3.1G

Hello,

Is it possible to do a memory scan to make sure the memory chips are good remotely via SSH? If possible what software can I use?

Thanks!

Google for memory test and for memory scanners; I'm sure you'll find something. Perhaps a floppy image booting from DOS; you don't want to do this after you're running Linux; that will probably only scan what Linux is reporting.

Jeff

I had to change the motherboard, now use Tyan 2881, works very well, can recognize 8G ram.