[Ocfs2-users] ocfs2 question

[Sunil Mushran]

The nodes have to be in the same cluster. Else you
will corrupt the fs.

Saranya Sivakumar wrote:
> Ok, we were able to mount the device on the existing standby node.
>  
> Mounting on existing standby after upgrading succeeded
> [root at guard2 ~]# mount -t ocfs2 -o datavolume,nointr /dev/emcpowern1 
> /orabackup1
>  
> Now when we try to mount it on the new standby node, we get the 
> following error
> Mounting on New standby:
> [root at guard0 /]# mount -t ocfs2 -o datavolume,nointr /dev/emcpowerf 
> /orabackup
> mount.ocfs2: Bad magic number in superblock while opening device 
> /dev/emcpowerf
> Note: /dev/emcpowerf on the new standby is the same storage as 
> /dev/emcpowern1 on the old standby.
> Also old standby and new standby are not in the same ocfs2 cluster.
> Does it have to be in the same cluster? Or can different ocfs2 
> clusters mount the same device as long as the ocfs2 versions match?
>  
> Regards,
> Saranya Sivakumar
>
>
> ------------------------------------------------------------------------
> *From:* Sunil Mushran <sunil.mushran at oracle.com>
> *To:* Saranya Sivakumar <sarlavk at yahoo.com>
> *Sent:* Wednesday, August 5, 2009 12:05:53 PM
> *Subject:* Re: ocfs2 question
>
> Always email ocfs2-users. Others can help you too.
>
> You have mismatching modules. Not sure how that can happen.
> Well, if one were to copy the modules around, it could happen.
>
> 1. Shutdown o2cb
> # service o2cb stop
> Ensure no ocfs2 modules are still loaded in memory.
>
> 2. Remove the ocfs2 kernel pacakge.
> # rpm --erase the ocfs2-2.6.9-42.0.3.ELsmp-1.2.9-1... package.
>
> 3. See if an ocfs2 module is still around.
> # find /lib/modules/`uname -r` -name \*ocfs2\*
>
> If so, then someone has been copying modules. Clean that up
> and reinstall.
>
> If you need more help, call oracle support.
>
> Sunil
>
> Saranya Sivakumar wrote:
> > Hi
> > We upgraded ocfs2 to 1.2.9 on the machine, but having errors trying 
> to mount with the new version now.
> >  /etc/init.d/o2cb status
> > Module "configfs": Loaded
> > Filesystem "configfs": Mounted
> > Module "ocfs2_nodemanager": Loaded
> > Module "ocfs2_dlm": Not loaded
> > Module "ocfs2_dlmfs": Not loaded
> > Filesystem "ocfs2_dlmfs": Not mounted
> > error while trying to mount
> >  mount.ocfs2: No such device while mounting /dev/emcpowern1 on 
> /orabackup1. Check 'dmesg' for more information on this error.
> >  Aug  5 11:40:18 guard2 modprobe: FATAL: Error inserting ocfs2 
> (/lib/modules/2.6.9-42.0
> > .3.ELsmp/kernel/fs/ocfs2/ocfs2.ko): Unknown symbol in module, or 
> unknown parameter (se
> > e dmesg)
> > Aug  5 11:41:09 guard2 kernel: ocfs2_dlm: disagrees about version of 
> symbol o2net_regi
> > ster_handler
> > Aug  5 11:41:09 guard2 kernel: ocfs2_dlm: Unknown symbol 
> o2net_register_handler
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol dlm_print_one_lock
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol dlm_errmsg
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol dlmlock
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol 
> dlm_unregister_eviction_cb
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol 
> dlm_unregister_domain
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol dlm_register_domain
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol 
> dlm_register_eviction_cb
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol 
> dlm_setup_eviction_cb
> > Aug  5 11:41:09 guard2 kernel: ocfs2: disagrees about version of 
> symbol o2net_register
> > _handler
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol 
> o2net_register_handler
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol dlm_errname
> > Aug  5 11:41:09 guard2 kernel: ocfs2: Unknown symbol dlmunlock
> >
> >  Please advice
> >  Saranya
> >
> >
> >
> > ------------------------------------------------------------------------
> > *From:* Sunil Mushran <sunil.mushran at oracle.com 
> <mailto:sunil.mushran at oracle.com>>
> > *To:* Saranya Sivakumar <sarlavk at yahoo.com <mailto:sarlavk at yahoo.com>>
> > *Cc:* ocfs2-users at oss.oracle.com <mailto:ocfs2-users at oss.oracle.com>
> > *Sent:* Tuesday, August 4, 2009 5:35:21 PM
> > *Subject:* Re: ocfs2 question
> >
> > ocfs2 1.2.3 is 3 years old. Suggest you upgrade that to 1.2.9.
> >
> > 1.2.3 and 1.2.9 are not network compatible. The mount will fail.
> >
> > Saranya Sivakumar wrote:
> > > Hi,
> > > We have a shared backup storage that resides on EMC storage and 
> mounted using ocfs2 1.2.3 on a physical standby database in production.
> > > We are in the process of adding another physical standby database 
> and need to mount the backup storage on the new physical standby as well,
> > >  to be able to recover a backup that resides on it.
> > > But the new standby has ocfs2 1.2.9 installed.
> > > Eventually we will be removing the current physical standby from 
> the configuration, but for a period of time both physical standby may 
> be using the same backup storage.
> > > Is it ok to mount the shared storage using different ocfs2 
> versions on different machines?
> > > Please advice.
> > >
> > > Thanks,
> > > Sincerely,
> > > Saranya Sivakumar
> > >
> > >
> > >
> >
> >
> >
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Ocfs2-users mailing list
> Ocfs2-users at oss.oracle.com
> http://oss.oracle.com/mailman/listinfo/ocfs2-users