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

[Sridhar Avantsa]

Cool. I will give that a try too.
Also in my wanderings on the web, I have come across the use fstab.order.
Also found this on metalink: in note *471256.1*
In the /etc/fstab.order file put in all the powerpath device names.

My preference would be to go the udev route, if i can get an example on how
to set that specfically for EMC pwerPath devices.
If you have, could you please share?

Thanks.

Will that work too ?

On Wed, Jun 10, 2009 at 1:37 PM, Sunil Mushran <sunil.mushran at oracle.com>wrote:

> There is another scheme (less elegant but probably quicker to deploy) that
> was described in this list by a user.
>
> As root run blkid. Then edit /etc/blkid.tab and remove all sd devices that
> correspond to the emcpp devices. Ensure pp is enabled. Rerun blkid. This
> time you should see the pp devices in /etc/blkid.tab. If not, you should be
> able to hand edit those device.
>
> Now mount by label and mount by uuid will mount the pp device.
>
> Sridhar Avantsa wrote:
>
>> 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<mailto:
>> 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 <mailto:joel.becker at oracle.com>
>>    Phone: (650) 506-8127
>>
>>
>>
>>
>> --
>> Sridhar Avantsa
>>
>> savantsa at gmail.com <mailto:savantsa at gmail.com>
>>
>> ------------------------------------------------------------------------
>>
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>
>


-- 
Sridhar Avantsa

savantsa at gmail.com
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