Re: RAW device permission changing dynamically on HPUX
- From: "LS Cheng" <exriscer@xxxxxxxxx>
- To: sjaffarhussain@xxxxxxxxx
- Date: Wed, 30 Jul 2008 12:15:07 +0200
Hi
In Linux you either put chmod and chown in rc.local to set raw devices
permissions or use udev.
In HP-UX I have not seen this issue, the permissions are persistent even
after reboot for Raw Devices.
In HP-UX 11.31 this can happen if the devices are created with mksf instead
of mknod, whenever you add new devices with insf -e this will reset
permissions
Thanks
--
LSC
On Wed, Jul 30, 2008 at 10:43 AM, Syed Jaffar Hussain <
sjaffarhussain@xxxxxxxxx> wrote:
> Hi list,
>
>
> We currently have a 4 node Oracle RAC on HP UX Superdom Itanimum II with
> EMC SAN (Symatrix DMX4) storage. Since few days, we are facing an abnormal
> situation where the RAW disks permissions (includes OCR, Voting and ASM
> disks) are getting changed dynamically and sometime during the node reboot
> too, which cause Cluster hung situation. Our current workaround is to reset
> the permissions to RAW disks.
>
> If I am not wrong, this sort of problem exists on Linux reboot and to
> prevent this, we need to set a parameter which keeps the existing parameter
> alive. I am not sure this is the same case on HP. Does anyone out there has
> faced similar kind of issue? or it is very abnormal situation?
>
> We did open a call with HP support and they said, basically, OS doesn't
> have any control on the RAW devices and definately it won't change the
> permission either dynamically or during the reboot time and they suspect
> Oracle might be doing something to change the permission.
>
> I have opened a TAR with Oracle too and waiting for the reply. Appreciate
> if someone can put some limelight on this issue.
>
> --
> Best Regards,
>
> Syed Jaffar Hussain
> Oracle ACE
> 8i,9i & 10g OCP DBA
> RAC Certified Expert
>
> Official Oracle RAC SIG Representative for Saudi Arabian region (
> http://www.oracleracsig.org/)
> http://jaffardba.blogspot.com/
> http://apex.oracle.com/pls/otn/f?p=19297:4:1579866181463918::NO:4:P4_ID:126
>
> ----------------------------------------------------------------------------------
> "Winners don't do different things. They do things differently."
>
>
>
> --
> Best Regards,
>
> Syed Jaffar Hussain
> Oracle ACE
> 8i,9i & 10g OCP DBA
> RAC Certified Expert
>
> Official Oracle RAC SIG Representative for Saudi Arabian region (
> http://www.oracleracsig.org/)
> http://jaffardba.blogspot.com/
> http://apex.oracle.com/pls/otn/f?p=19297:4:1579866181463918::NO:4:P4_ID:126
>
> ----------------------------------------------------------------------------------
> "Winners don't do different things. They do things differently."
>
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