invalid operand 0000
 

Hi Linux expert
Appreciate if anyone can help. I am using Red Had Linux 7.2 kernel 2.4.7-10smp for my server (compaq proliant)

My server is not stable, I have to reboot many times for it to work. Sometimes during the boot process error message appear sometimes has not error message and it boot up ok. I have encountered server freeze in two occasion.

1) After boot up and log in, I insert my backup tape. Before I can do anything it appear the following message then it freeze.

Invalid operand 0000
CPU :0
EIP:0010:[<0132ef5>]
EFLAGS:00010282
eax: 000000b9 ebx:c14110e0 ecx:c0247f20 edx:000035el
ds:0018 es:0018 ss:0018
process-kswapd (pid:5, stckpage=c1739000)
stack: c14110e0 c013481c c14110e0 c1738000 c0247cc9 c1738335 0008e000 c0134c88
00000000 00000006 c0105836 00000000 c0134bd0 c0279fc0
call trace:[<c013481c>] [<c0247cc9>] [<c0134c88>] [<c0105000>] [<c0105000>] [<c0105835>] [<c0134bd0>]
code 0f 0b 8b 43 18 83 e0 40 75 14 8b 43 18 a9 80 00 00 00 75 09

2) Error happen during the boot process
Remounting root filesystem in read-write mode:
Uhhuh, NMI received, Dazed and confused, but trying to continue you probably have a hardware problem with your RAM chips.

Appreciate if anyone can help.

x2000koh

Apparently the kernel couldn't handle the memory bank at some point, you should try to run a memory test utility like memtest86 for a couple of hours or try to update your kernel ...

how to get memtest utility
 

Hi ! vladkrack
Thanks for reply. Where can I get the memtest86 utility ? where should I download it ? What is the function of memtest86 ? what is this utility doing ? After run the unitility what should I do ?

I am new to this problem. I need to make a clone harddisk and test the unitility how can I do that ?

Regards,
x2000koh

Hi,

This is the official site of memtest:
http://www.memtest86.com/

It has the description of all tests used, the application to download, and all information you will need.

To backup your data, there are several applications that can do this kind of job, but an option is to backup with tar.