topic IOSCAN problem in Operating System - HP-UX

IOSCAN problem

Aggy — Wed, 04 Apr 2007 06:13:44 GMT

We have got issues with IOSCAN.
We have got 3 Npar's on RX8620 Server and on one of our NPARS the IOSCAN hangs after few days and unfortunately that is our production server.
The only option is to reboot the server and then we can run ioscan for another few days

List of Ioscan process hung.

root/> ps -ef | grep ioscan
root 17946 1 0 Apr 2 ? 0:00 /sbin/ioscan -F
root 897 881 0 Mar 30 ? 0:00 /sbin/ioscan -F
root 9942 9915 0 Mar 27 ? 0:00 /sbin/ioscan -F
root 1161 1 0 Mar 28 ? 0:00 /sbin/ioscan -F
root 27875 27788 0 Mar 29 ? 0:00 /sbin/ioscan -F
root 13929 1 0 Mar 30 ? 0:00 /sbin/ioscan -F
root 22104 22050 0 Mar 30 ? 0:00 /sbin/ioscan -F
root 3208 3175 0 18:38:31 ? 0:00 /sbin/ioscan -F
root 7757 7660 0 Mar 28 ? 0:00 /sbin/ioscan -F
root 7917 7882 0 Apr 2 ? 0:00 /sbin/ioscan -F
root 5800 5616 0 Mar 28 ? 0:00 /sbin/ioscan -F
root 27537 1 0 Mar 29 ? 0:00 /sbin/ioscan -F
root 18029 17987 0 Mar 29 ? 0:00 /sbin/ioscan -F
root 12528 12487 0 Mar 28 ? 0:00 /sbin/ioscan -F
root 22074 1 0 Apr 2 ? 0:00 /sbin/ioscan -F

Re: IOSCAN problem

Peter Godron — Wed, 04 Apr 2007 06:25:18 GMT

Aggy,
have you checked any NFS connections haven't dropped ? Anything in dmesg, /var/adm/syslog/syslog.log ?

Please also read:
http://forums1.itrc.hp.com/service/forums/helptips.do?#33 on how to reward any useful answers given to your questions.

Re: IOSCAN problem

Steven E. Protter — Wed, 04 Apr 2007 06:47:19 GMT

Shalom,

ioscan is a diagnostic tool and should be run when you have a reason, not on an automated basis. I see little value to running a tool that is that harsh on the system for system checking purposes.

You should fire up cstm/mstm or xstm and find out where the hardware problem that is harming the system is.

SEP

Re: IOSCAN problem

Aggy — Wed, 04 Apr 2007 07:07:52 GMT

Do not see much info in dmesg or syslog.

Re: IOSCAN problem

Rasheed Tamton — Wed, 04 Apr 2007 07:13:08 GMT

Did you try running ioscan with class options.

ioscan -fnC disk or lan , etc.

Why you run ioscan -F option.

Try running ioscan -fkC disk [kernel only not actual scan]

I think without rebooting the hung options will not be gone.

Also you can use onling diagnostic tools to look for errors.