topic System often reboot in Operating System - HP-UX

System often reboot

Stanley Tsui — Wed, 10 Mar 2004 16:56:04 GMT

Hi everyone,
I'm experiencing frequent reboot problem lately on my D220 with HP-UX B.10.20. Base on the information I found on shutdownlog, "Reboot after panic: reactivate: cannot bring in U area", it seems like I have problem on my swap area. HP CE wasn't able to find any hardware related problem. In fact, the message above is the only message that we can found. The CE suggested to get hold of a copy of Ignite-UX, replace the drive. However, we are not able to find a copy of Ignite-UX for 10.20 anywhere. Beside the other option of migrating the O/S to 11, what else can I do?

Currently, we have 128MB memory, and 256MB swap. We still have some unallocated space left on vg00.

Now, my question is,
1. Is it OK to create a 2nd swap, activate it, turn the primary swap off and replace it with the 2nd as 1st.
2. If I create a 2nd swap, set the priority higher and set the primary with a lower priority. Will that work.

I don't expect the above will fix the problem since if I suspect we have bad block on the drive. But I do hope that can buy me more time so that I can have a long term solution to this problem.

Any suggestion is welcome.

Stan

Re: System often reboot

Sridhar Bhaskarla — Wed, 10 Mar 2004 17:03:23 GMT

Hi Stan,

Your 2 option is looking good. Is the system paging?.

#swapinfo -t

and see "KB used" column corresponding to "dev" entries.

You can certainly create a 2 nd swap and give it priority '0' so that it is always used first. I don't remember how the primary swap is given the default priority on 10.20 but on 11.0 and onwards it is with 1 so you can always create a secondary swap with low priority value (high priority).

-Sri

Re: System often reboot

Stanley Tsui — Wed, 10 Mar 2004 18:15:00 GMT

Thanks. It's good to know I'm not too far off. Yes, the system is doing some paging.

# swapinfo -t
Kb Kb Kb PCT START/ Kb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 262144 45700 216444 17% 0 - 1 /dev/vg00/lvol2
reserve - 95908 -95908
memory 76736 52876 23860 69%
total 338880 194484 144396 57% - 0 -

I'll try to implement one of the option this weekend and hope the system will hold up till that time. Thanks again.

Stan