[Linux-cluster] replacing HBA

[Paras pradhan]

Thanks Keith. I will try and let all know how it goes.

Paras.

On Tue, Sep 13, 2011 at 5:50 PM, Keith Schincke
<keith.schincke at gmail.com> wrote:
> Hmmm. The UUID of the physical volume should be written to disk (sdj) or
> partition (sdj1) depending on your design.
> kpartx should not care about the data on the disk (ie your UUID) when it
> makes the mpathXpY entries.
>
> Hopefully what will happen will be
> - install your hba and zone the SAN as necessary
> - enable multipathd and restart. This should create the mpathX entries.
> multipath -ll will list the paths and disks
> - run kpartx -a to add needed mpathXpY entries. I do not know if this runs
> on startup.
> - reboot and see if you can mount the LVM.
>
> If all goes right, pvdisplay should display the multipath devices of your
> PVs.
>
>
> On Tue, Sep 13, 2011 at 5:11 PM, Paras pradhan <pradhanparas at gmail.com>
> wrote:
>>
>> On Tue, Sep 13, 2011 at 4:30 PM, Keith Schincke
>> <keith.schincke at gmail.com> wrote:
>> > How many paths doe you currently have to your disk?
>> > Does your LVM use the multipath name (mpath0)?
>>
>> Right now only one path with no multipath configured so LVM is not
>> using mpath0. Ideas?
>>
>> Thanks!
>> Paras.
>>
>>
>> >
>> > Sent from my iPhone
>> >
>> > On Sep 13, 2011, at 14:46, Paras pradhan <pradhanparas at gmail.com> wrote:
>> >
>> >> Thanks Bob.
>> >>
>> >> Another question. What about replacing single port HBA with a dual
>> >> port. After configuring the multipathd, can I reconfigure physical
>> >> volume without destroying the vg, lv and clvm ? I am kinddda lost
>> >> here.
>> >>
>> >> Thanks
>> >> Paras.
>> >>
>> >> On Tue, Sep 13, 2011 at 1:04 PM, Bob Peterson <rpeterso at redhat.com>
>> >> wrote:
>> >>> ----- Original Message -----
>> >>> | Hi,
>> >>> |
>> >>> | I am replacing a 2 Gig Qlogic HBA with a 4 Gig Qlogic HBA in my GFS2
>> >>> | cluster. Apart from changing wwn in the SAN, what else do I need to
>> >>> | change in Linux (centos). will the change be reflected
>> >>> automatically?
>> >>> |
>> >>> |
>> >>> | Thanks!
>> >>> | Paras.
>> >>>
>> >>> Hi Paras,
>> >>>
>> >>> The GFS2 file system doesn't care what HBA you're using.
>> >>> So as long as your kernel has a good device driver for that HBA
>> >>> you shouldn't need to do anything else.
>> >>>
>> >>> Regards,
>> >>>
>> >>> Bob Peterson
>> >>> Red Hat File Systems
>> >>>
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>> >>>
>> >>
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