[Ocfs2-users] OCFS2 mount problem at Linux reboot when device names are non persistent.

[Marcos E. Matsunaga]

Luis,

>From the mount manpage on EL4:

DUPLICATE LABELS
       mount includes support for systems where same partition  is 
shared  between  different  devices  (e.g.  multipath  kernel
       drivers).  In  particular case when mounting device by LABEL,
mount command reports problem with duplicate labels. You can
       define priority of devices in file /etc/fstab.order as simple
list of devices.  The  devices  listed  in  this  file  have
       greater priority than odd devices. Devices in configuration file
have descending priority.

Regards,

Marcos Eduardo Matsunaga

Oracle USA
Linux Engineering





Luis Freitas wrote:
>  
> Anyone got this working on emc powerpath?
>  
> I remeber seeing somewhere some special configuration to get mounting
> by label working with multipath devices, but could not find it again.
>  
> Regards,
> Luis
>
> */Ricardo Fernandez <Ricardo.Fernandez at quanam.com>/* wrote:
>
>     Hi people,
>
>     Thanks a lot for your answer!
>     It worked perfectly.
>
>     Best regards
>     Ricardo
>
>
>
>     -----Original Message-----
>     From: Sunil Mushran [mailto:Sunil.Mushran at oracle.com]
>     Sent: viernes, 24 de agosto de 2007 14:26
>     To: Randy Ramsdell
>     Cc: ocfs2-users at oss.oracle.com; Ricardo Fernandez
>     Subject: Re: [Ocfs2-users] OCFS2 mount problem at Linux reboot when
>     device names are non persistent.
>
>     While mount-by-uuid will work, mount-by-label should also work.
>     The one gotcha in the latter is that it expects the device to be
>     partitioned. As in, it will not mount-by-label if the device is
>     /dev/sda
>     but will if the device is /dev/sda1 or sda2, etc.
>
>     Randy Ramsdell wrote:
>     > Ricardo Fernandez wrote:
>     >
>     >> Hi,
>     >>
>     >> I have the following problem when the servers accessing OCFS2
>     reboot:
>
>     >> as the Linux device names are non persistent, at reboot they
>     usually
>     >> change, and then OCFS2 can't mount the device because it is
>     expecting
>
>     >> a different device name as stated in the fstab file. (it is
>     specified
>
>     >> in the format /dev/sdx as the instructions of the OCFS2
>     installation
>     >> manual say) If I change the device name to the "new" name, it
>     works
>     >> fine. But this is not an acceptable solution, as each node
>     should be
>     >> able to start in a fully automatic way. (without human
>     intervention)
>     >>
>     >> I thought that the purpose of the disk LABEL that I added when
>     >> formatting the partition with OCFS2 was exactly this. (Am I
>     right?) I
>
>     >> changed the fstab to use the LABEL option, and also try to
>     mount it
>     >> from the command line using the LABEL option but it didn't
>     work. Is
>     >> there any bug or known issue on this topic. I guess that if I glue
>     >> the device name with udev it will work, but I really would expect
>     >> OCF2 to solve this problem (because it is not a new one, and
>     most of
>     >> the file systems I know can handle it)
>     >>
>     >> I would appreciate any help on this topic.
>     >>
>     >>
>     >> Thanks a lot
>     >> Ricardo
>     >>
>     >> I work with:
>     >>
>     >> RHEL 4
>     >> Local SCSI devices
>     >> External devices locates in an EVA8000 SAN, accessed through a
>     fibre
>     channel bus. The OCFS2 file system is on one of these.
>     >>
>     >>
>     >> _______________________________________________
>     >> Ocfs2-users mailing list
>     >> Ocfs2-users at oss.oracle.com
>     >> http://oss.oracle.com/mailman/listinfo/ocfs2-users
>     >>
>     >>
>     > Do not use label use UUID name and _netdev_ fstab option.
>     > This is the UUID of a volume we have.
>     > /dev/disk/by-uuid/be12775a-ec1c-4ed7-a06b-f30a081a0603
>     >
>     > UUID's are unique and never change so they are ideal for what
>     you are
>     > describing.
>     >
>     > Randy Ramsdell
>     >
>     > _______________________________________________
>     > Ocfs2-users mailing list
>     > Ocfs2-users at oss.oracle.com
>     > http://oss.oracle.com/mailman/listinfo/ocfs2-users
>     >
>
>
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