Re: RAW device permission changing dynamically on HPUX

I would say, its not the RAW disks permission which is changing, rather it is the ownership permission changing on the RAW disks.

On Wed, Jul 30, 2008 at 1:15 PM, LS Cheng <exriscer_at_gmail.com> wrote:

> 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_at_gmail.com> 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."
>>
>
>

-- 
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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