Re: [suse-oracle] Raw Partitions - Device Name Persistence on SUSI

>>> On 7/20/2010 at 02:36 PM, <[email protected]> wrote: 
> Folks,
> 
> We are installing Oracle 11g RAC Standard Edition on top of SUSI 10.  We
> are using raw partitions and Oracle Clusterware.  Early on we hit the
> problem of our device names changing when changes were made to the
> underlying storage (EMC Clarion).  We have been able to protect our
> database data partitions with ASMLib but of course ASMLib can't be used on
> the Clusterware partitions (voting disks and OCR).  We haven't found a good
> solution yet.  Oracle Clusterware doesn't support Logical Volume Managers
> and Novell told my Sysadmin that SUSI doesn't support using udev to provide
> device name persistence.
> 
> What does everyone out there use to provide device name persistence on
> SUSI?  Surely everyone deploying RAC on SUSI doesn't have to deal with
> device names changing everytime the underlying storage changes.
> Reinstalling Clusterware each time isn't a good long-term strategy.  :)
> 

You don't provide any indication of how you're configuring your raw devices.
So, I'm going to have to provide a general answer and not something specific
to your configuration.

raw devices are configured via /etc/raw, where you specify something like..
raw1:sda1
saw2:sdb1

sd* devices are not persistent and should not be used (I assume this is what
you're doing), so you should use one of the persistent names such as the 
/dev/disk/by-id path of the device such as:

raw1:disk/by-id/scsi-SATA_WDC_WD5000YS-01_WD-WCANU1986509-part1

Hope this helps,

Thomas Abraham
Premium Support Engineer
Novell Technical Services
[email protected]
(313)617-4330

Novell, Inc
Making IT Work As One
www.novell.com

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