vmunix: ct_query failed. hw_path

[clefeitosa]

Hello!

I'm using HPUX 11 and DMX Symmetrix EMC.

I'm receiving some messagens in syslog.log like this: vmunix: ct_query failed. hw_path = 0/0/8/0/0 and I was studying here in ITRC but I didn't find one solution for this problem.

Follows attached the result of command:
#ioscan -fnH 0/0/8/0/0

Please, could someone give me a help because I didn't undestand what I have to do.

Thanks,
clefeitosa

[Steven E. Protter · Accepted solution]

Shalom,

A very common problem.

HP-UX detects the disk array itself as LUN0.

But its not a disk so it sets off bad disk alarms.

The way to make the issue go away is to have the EMC admin assig your system a lun as LUN0. Then the array itself will not be detected as anything.

SEP

[clefeitosa]

Hi Steven,

Thanks for answer!
There is others ways to solve this issue? Because what did you recommend will imply in many things so I prefer don't do this.

So, in your opinion if I wont do anything I will have any problems?

Thanks

[Hein van den Heuvel]

Hmm,

This is not an area I know too much about, but the attachement in the topic suggests to me that hpux does recognize the controller lun. For examle in the last line:

ctl 8 0/0/8/0/0.2.11.255.0.0.0 sctl NO_HW DEVICE EMC SYMMETRIX /dev/rscsi/c12t0d0


>> vmunix: ct_query failed.

Can you figure out when this happens?
- Boot only?
- Regularly (seconds? minutes? hours?)
- Every time the command xyz is used?

fwiw,
Hein.

[clefeitosa]

Hi Hein,
Thanks for answer.

Follows:

host:~> who -b
. system boot Oct 25 02:10
host:~>
host:~> grep -i vmunix /var/adm/syslog/syslog.log
Jan 31 04:00:58 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Jan 31 04:01:21 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 1 04:01:07 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 1 04:01:29 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 1 04:02:34 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 2 04:00:57 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 2 04:01:21 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 3 02:00:30 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 3 04:01:08 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 3 04:01:30 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 4 04:01:03 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 4 04:01:24 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 5 04:00:56 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 5 04:01:20 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 5 09:14:26 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 5 09:14:47 host vmunix: ct_query failed. hw_path = 0/0/8/0/0
Feb 5 10:04:51 host vmunix: ct_query failed. hw_path = 0/0/8/0/0

What do you think?

Tks

[Hein van den Heuvel]

>> What do you think?

I think it is no coincidence that this message appears every morning at 04:01.

Is that when the cleaning crew plugs in the floor wax machine? :-)

Looks for cron jobs around that time.
Maybe even set up a script to scan the log and do a ps -ef as soon as the message appears?

And uh... check with support both on EMC and HP side.

fwiw,
Hein.