[gpfsug-discuss] Server lost NSD mappings

[Sven Oehme]

if you still have a running system you can extract the information and
recreate the descriptors.
if your sytem is already down, this is not possible any more.

which is why i suggested to open a PMR as the Support team will be able to
provide the right guidance and help .

Sven

On Wed, Oct 29, 2014 at 10:19 AM, Jonathan Buzzard <jonathan at buzzard.me.uk>
wrote:

> On Wed, 2014-10-29 at 09:42 -0700, Sven Oehme wrote:
> > Hello,
> >
> >
> > there are multiple reasons why the descriptors can not be found .
> >
> >
> > there was a recent change in firmware behaviors on multiple servers
> > that restore the GPT table from a disk if the disk was used as a OS
> > disk before used as GPFS disks.  some infos
> > here :
> https://www.ibm.com/developerworks/community/forums/html/topic?id=27f98aab-aa41-41f4-b6b7-c87d3ce87b9e
> >
> >
> > if thats the case there is a procedure to restore them.
>
> I have been categorically told by IBM in no uncertain terms if the NSD
> descriptors have *ALL* been wiped then it is game over for that file
> system; restore from backup is your only option.
>
> If the GPT table has been "restored" and overwritten the NSD descriptors
> then you are hosed.
>
> JAB.
>
> --
> Jonathan A. Buzzard                 Email: jonathan (at) buzzard.me.uk
> Fife, United Kingdom.
>
>
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