Re: RAW device permission changing dynamically on HPUX

Say

voting disks are

oracle:dba and 660

How are your permissions changing?

to root:root?

Thanks

--
LSC


On Wed, Jul 30, 2008 at 2:01 PM, Syed Jaffar Hussain <
sjaffarhussain_at_gmail.com> wrote:



> 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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