[Ocfs2-users] How to mount OCFS2 file systems using the EMC Power Path multipath device

[Sridhar Avantsa]

Joel,
Thanks for the reply.
Wondering if you have a sample udev set up using power path on hand that I
can use to get going.

Thanks

On Wed, Jun 10, 2009 at 12:43 PM, Joel Becker <Joel.Becker at oracle.com>wrote:

> On Wed, Jun 10, 2009 at 12:22:03PM -0500, Sridhar Avantsa wrote:
> > OEL 5, OCFS 1.4, using EMC Power Path for multi pathing.
> >
> > I want t mount the OCFS2 file system on the emc power path device.
> > I can mount by UUID, and not have to worry about persistent bindings
> across
> > nodes.
> > But how do I make sure when it mounts by UUID , that the pwoer path
> device
> > is used.
> >
> > Any help will be much appreciated.
>
>         There are two things you can do.  The first is to not worry,
> because PP takes over all devices.  That is, if 'sda' and 'sdb' are two
> paths of 'emcpowera', it doesn't matter whether you open /dev/sda1,
> /dev/sdb1, or /dev/emcpowera1.  PP has hijacked the devices and is used
> in all cases.
>        Now, a lot of people consider this to be unkosher and wish that
> PP didn't hijack the devices.  Maybe in the future EMC will change this.
> You can, of course, not worry about it until they do.
>        The other alternative is to use udev to ensure you have a device
> name that points to the right device.  Then you just mount by the device
> name.  For example, a udev rule that only triggers on 'emcpower*'
> devices, checks that they are ocfs2 volumes, and then creates
> /dev/mydisks/<uuid> for them.
>
> Joel
>
> --
>
> Life's Little Instruction Book #396
>
>        "Never give anyone a fruitcake."
>
> Joel Becker
> Principal Software Developer
> Oracle
> E-mail: joel.becker at oracle.com
> Phone: (650) 506-8127
>



-- 
Sridhar Avantsa

savantsa at gmail.com
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