02-04-2003 01:27 AM
We have a B2600 system with hp-ux 11i. After a reboot yesterday it is not coming up. From BCH when I try to boot it gives the following error,
"Double bit error discovered in kernel memory "
and it reboots the system. I am not able to boot the system even in single user / maintenance mode. All the DIMMs are inserted properly.
What could be the problem??
02-04-2003 01:37 AM
I would get yopur memory checked out.
02-04-2003 01:41 AM
But the from BCH, MA> IN> ME
shows all the installed DIMMs as configured .. and didn't return any error ....!!
02-04-2003 01:45 AM
Well, haven't seen that error before. Not sure where it would come from either, looks like the OS caught it rather than hardware but I assume it would mean a problem with a memory module, probably the one in the lowest slot as only this one will be active this early in boot I believe.
Apart from replacing the module, I can think of two options:
1) Turn fastboot off to see if the page is caught and deallocated.
2) In the unlikely event of a software (kernel) problem try booting from the previous kernel.
02-04-2003 01:48 AM
point during which the system recieves a double bit error that raised a system panic.
Fastboot ON minimizes in examining the RAM tests.
Try changing to FASTBOOT OFF.
You should examine your modules
02-04-2003 01:57 AM
After disabling fast boot I get the following error after the double bit error,
"rebooting the system to let the PDC correct the problem"
Unfortunately, I donot have any backup kernel. Infact it was a newly installed.
I think I should try replacing the Memory module and test it.
02-04-2003 02:01 AM
That message is normal, the important thing is what happens on the next boot. The memory is checked at the lowest level of the boot, so after turning fastbbot off you would need to reboot for the memory to be checked.
02-04-2003 02:14 AM
After a reboot also I didn't get any memory errors. Even I tried with different memory module but the problem persists.
Planning to reinstall the OS :-(
02-04-2003 05:06 AM
are you sure that kernel memory can be deconfigured or relocated? I do not think so as soon as it does not happen in this case :o(
In addition, turning fastboot off may cause workstation do not POST at all.
Kartik, if you have some DIMMs in the workstation try moving them around the slots to understand which DIMM is faulty (I guess DIMM in slot 0?). The best solution is to replace faulty memory DIMM. Call HP
02-04-2003 09:56 AM
02-05-2003 01:14 AM
Ok, what is a double-bit parity error?
On newer machines (your B2600 is an example of this), memory content is not relied upon, so it is checked using a powerful (or not so-powerful) check code. It can actually correct single-bit errors (how smart), but not double-bit errors... they are DETECTED but not CORRECTED. So, simply, one of your memory cards detected a double-bit error, couldn't correct it, so out comes the message for you to see.
Please tell us the exact chassis code that is coming up so that we could tell you more (like which memory DIMM is the culprit).
02-05-2003 04:40 AM
After reinstallation of OS With the same memory module the system is working fine .!!
08-04-2009 01:35 AM
first - you should use your own thread for questions - of course you can insert a link to another thread if that explain your problem.
Well, insert your os cd and boot from cd.
Or - if you have an ignite backup - boot from ignite (server or tape).
If you have more detailed qusetions please ask (with your own thread) in this forum: