topic /dev/async file permissions getting changed, in Operating System - HP-UX

/dev/async file permissions getting changed,

unix adm — Wed, 27 Jun 2007 07:37:13 GMT

Hi All,

I have oracle 9i database running on HP UX 11.23.

We are using Vxfs.

We have a problem with the permissions on /dev/async value this is getting changed automatically from 660 to 666. and this is causing asynchronous error in database.

Everytime we change it manually and it is changing back automatically we don't know when and how ?

Could any body please help. This is urgent.

Thanks
Rajeev

Re: /dev/async file permissions getting changed,

Steven E. Protter — Wed, 27 Jun 2007 09:39:19 GMT

Shalom,

Check who has permissions on /dev/async
Check their keystroke logs for chmod.
Check their cron jobs for chmod commands.

SEP

Re: /dev/async file permissions getting changed,

kenj_2 — Thu, 28 Jun 2007 09:07:50 GMT

Hi Rajeev -

In addition to the checks mentioned above, check the timestamp on the file ... and any job that may be calling insf (-e).

Ken

Re: /dev/async file permissions getting changed,

Mike Boswell_1 — Thu, 12 Jul 2007 09:54:57 GMT

We have been seeing the same behavior on our 11.23 running 9i. Any chance this is related to Ignite? Seems to coincide w/ creating an image of said server.

Mike

Re: /dev/async file permissions getting changed,

unix adm — Thu, 12 Jul 2007 09:59:52 GMT

Does not look like related with ignite we have ignite running every Sunday morning however this is happening very random, observed for 3 times in last 4 months.

I am unable to stablish any reason for this yet.

Thanks and regards
Rajeev

Re: /dev/async file permissions getting changed,

Yogeeraj_1 — Thu, 12 Jul 2007 23:48:43 GMT

hi Rajeev,

To be able to troubleshoot this, you should first determine when the change is occurring.

Step 1.
========
Create a cron job that will run every hour and log the file permission status to a file which you can verify every now and then.

e.g.
ll /dev/async > /tmp/monitor_async.log

Step 2.
=======
After you have found when the change is occurring, verify your environment for all activities during that interval.

Btw, what error are you getting?
You may wish to read metalink note: "139272.1 - HP-UX: Asynchronous i/o"

Good luck.

kind regards
yogeeraj

Re: /dev/async file permissions getting changed,

unix adm — Mon, 17 Dec 2007 15:54:03 GMT

It was "insf -e" which was chnging the permissions of the file. Every time we were adding some disks we do run insf -e and that was causing a problem

Thanks to all who has replied to this forum for your valuable suggestions
Rajeev