Memory on Intanium servers

[eltorito]

Dear Gurus,

I have added memories on itanium servers and all is working fine. My question is:

If I have memories of differents speeds, Can I have performance problems?
How I Can know the memories speed by Linux Commands or MP commands?

Thanks.

PS. OS Linux RHEL 3

[Murat SULUHAN]

Hi

You may have problems with different type of memories

To check memories connect to MP
then type CM
then type DF

You can see DIMM numbers and installed memories

Best Regards
Murat

[eltorito]

Dear Murat,

I have typed this command after that "A" (A - All available FRUs)

I have read all the memory information but I can know what is the speed or kind of memory is it. Can you help me? this is a short output:


Type for next entry, or Q to quit:

FRU Entry # 21 :
FRU NAME : DIMM1C
FRU ID : 0xB0
JEDEC SPD Rev : 0x00
JEDEC Mfg ID : 0x7F94FFFFFFFFFFFF
JEDEC Mfg Location : 0x02
JEDEC Mfg Part # : 2660-0007-IFICHT0A
JEDEC Mfg Revision Code : 0x00FF
JEDEC Mfg Year : 0x67
JEDEC Mfg Week : 0x29
JEDEC Mfg Serial # : 0xE8024021
Mfg Unique Serial # : 0x0194026729E8024021

[Murat SULUHAN]

Hi Eltorito

Could you paste more information there must be a string like A6967AX or A6969-69001

Best Regards
Murat

[eltorito]

Hi Murat!

Thanks, Here is a txt file about DF output

Thanks for all.

[Murat SULUHAN]

Hi Eltorito

What type of server do you have rx...?

And where did you buy RAM modules? I think this is not HP brand RAMs

Best Regards
Murat

[eltorito]

Servers are rx4640 and memories was bought in HP partner.

Do you can see something?

Is posible see any problems?

Thanks

[Murat SULUHAN · Accepted solution]

Hi Eltorito

DF is not used for system hardware monitoring or checking DIMM problems in your case

You should see System Event Logs or OS logs to monitor hw.

Your DIMM part numbers does not look like HP Part Numbers. You can check which DIMM modules compatible with your system from following url
http://partsurfer.hp.com/cgi-bin/spi/main?sel_flg=modsrch&template=main&cpric=&prodsrch=RX4640&submit.x=0&submit.y=0

you should also ask to your sales consultant

Best Regards
Murat

[eltorito]

Thanks,

I am going to send this output to sales consult.

This informmation is useful true?

Thanks for you support and will post the conclusion.

Greetings.

[Sameer_Nirmal]

You might have zx2 chipset based rx4640 which is compliant with JEDEC DDR2 standard.

Try "dmidecode" command which will give you the information you are looking for.


There is a penalty of memory underclock if you mix the memory with different speeds which mean under-utilizing the hardware and compromise the memory IO performance.

[eltorito]

Hello,

In what package Can I find the dmidecode?

Actually is not found this command..

Thanks

[Sameer_Nirmal]

It is a part of the kernel-utils package.

[eltorito]

I am crazy!

I have this package but not found the command.

[root@ita4 otro]# find / -name dmidecode
[root@ita4 otro]# rpm -ivh kernel-utils-2.4-8.37.15.ia64.rpm
[root@ita4 otro]# rpm -qa kernel-utils
kernel-utils-2.4-8.37.15
[root@ita4 otro]# find / -name dmidecode
[root@ita4 otro]# dmidecode
-bash: dmidecode: command not found

Help me!

[Sameer_Nirmal]

Not sure why it's not there in .15 . I see it's available in .5 rpm release.

Try "dmidecode" from public domain

http://www.nongnu.org/dmidecode/


There is another nice alternative is "lshw"

http://ezix.org/project/wiki/HardwareLiSter#Installation


Just download then in /tmp and compile using "make" command.

[eltorito]

I sent the data to sales consult with MP logs and replied me about the speeds.... all is fine, up, ready and running,

Thanks a lot of!