HP 9000
cancel
Showing results for 
Search instead for 
Did you mean: 

Should all processors in the same nPar be identical?

stephen peng
Valued Contributor

Should all processors in the same nPar be identical?

Guys,

Four Cells in the same nPar in an rp8400 and one(Cell 2) of them failed, after the replacement of the failed Cell, it could not join the partition when it booted. The replacement was bearing 4 A6435-69001 processors, and in the other Cells, A6435-04001. was this differency caused the issue? should all processors in the same nPar be identical?

 

by the way, how to understand IODC and what role the DIP switch on the Cell plays?

 

 

regards

Stephen

2 REPLIES
Torsten.
Acclaimed Contributor

Re: Should all processors in the same nPar be identical?

>> should all processors in the same nPar be identical?

 

Yes, must be the same!


Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
Robert_Jewell
Honored Contributor

Re: Should all processors in the same nPar be identical?

The DIP switches on the cells set the clock speed of the CPU's.   So, depending on the processor type, you can actually get away with running higher speed CPU's by under clocking them to match the other cells CPUs (note that you cannot over clock!)

 

For example:

 - Cell 0 is running PA8700 750Mhz.  This has a certain DIP switch setting to support this.

 - Cell 1 can have PA8700 875Mhz CPU's installed as long as the same DIP switches above are set.  The CPU's will run at 675Mhz.

 

What do you mean by "understanding IODC"?

 

-Bob

----------------
Was this helpful? Like this post by giving me a thumbs up below!