System pool in NX4

OK... I know that, but...

When I created new raid group on clariion as R10 with two luns...

After rescan NX4 created new storage pool clarsas_r10 (i cant remember)

but after I have to delete those storage pools (system created) and start from begining after rescan there are no storage pools even when I use same raid/lun config...

System defined pools get created by themselves when they see a supported lun configuration. For example if you had some fibre channel drives and made them into a R5 (8+1) config, a new system defined pool would show up as clar_r5_economy.

There are some default volumes that the Celerra puts it's OS on, and those will still show up even after you have deleted all user created luns.

At this point, the option is to contact EMC Support and they 'll recreate the system pools for you. As Rainer had already mentioned, please do not delete any system defined pool - if you want to re-configure the storage - simply delete the disks on Celerra so that the pool size becomes zero and then you 'll not see the pool. But pool definition is not deleted, so next time when you configure the disks again, appropriate pools can be automatically used. Now, since you have deleted the pool definition, it needs to be recreated by Support.

Thanks,
Sandip

A list of what volumes you are seeing would be helpful. log in to the Celerra control station via an SSH client like putty using you nasadmin username and password. Run the following command:

nas_disk -l

This will give you an output of your volumes.

Yes thanks guys

I know commands etc...

but you know I would like to do new layout of luns, but I cant remove volumes (disks) from pools... so I delete pools and then I can delete volumes...

Is somewhere described description how to remove disks (volumes) from pools?

Because I cant delete them from GUI and in CL too...
They was been used by storage pool, but no where else...

That was the problem because I need to delete pools...

please look at the AVM and MVM manuals

In general deleting pools wont help you much.

In fact you shouldnt delete a system pool - only user defined pools.

What you do in order to change the backend layout:
- check that these LUNs arent used by the Celerra any longer
- check again
- delete all the volumes that are on the LUNs using nas_volume
- remove the LUNs from the Celerra storagegroup
- unbind the LUNs

Thanks Rainer

I never seen this before, you know the right order...

But what I have to do when this step: - remove the LUNs from the Celerra storagegroup
isnt possible because they are used by storage pool and I cant remove them?

Because that was the problem why I delete system pools... (cry)

Thanks

PS: Another one problem appear when I would like to configure NW with Celerra (NDMP) it wrote NAS_DB environment not defined, can I fix that somehow?

Is there some utility to repair (recover) Celerra or I have to reinstall DART...

Thanks!

zewl23

Message was edited by:
zewl23

OK ok... its defined now

but lest look back...

please look at the AVM and MVM manuals

In general deleting pools wont help you much.

In fact you shouldnt delete a system pool - only user defined pools.

What you do in order to change the backend layout:
- check that these LUNs arent used by the Celerra any longer
- check again
- delete all the volumes that are on the LUNs using nas_volume
- remove the LUNs from the Celerra storagegroup
- unbind the LUNs

What I have to do when I cant remove disk(volume) from storage pool?

I would like to reset layout on backend but I want to do it on celerra first, then on clariion... So all what was in storage pool wasnt used (i checked thi not only once) but when i would like to remove disk(volume) from celerra it wrote that this disk(volume) is used by storage pool... so only the last think what i have on mind was to delete storage pools and then delete disks(volumes) from celerra, then set up new layout on clariion and then rescan celerra... but my mistake was, that the system defined storage pools will be recreated after succesfull rescan... (cry)

Today I go to EMC and I will discuss this...

BUT if there is some possibitlity to define system pool please let me know...

IF is it about some restore or repair of somethink just let me know...

THANKS!

Deleting a storage pool on the Control Station does not free up storage or delete a LUN.
But when you are doing this, you will no longer be able to extend or create a FS which resides on LUNS of this pool.



This is a error message, when you are not using nasadmin as login but maybe root or another user. You can fix this by defining the environment, by login in as nasadmin.

Reinstalling DART will not solve this issue

Please refer to solution id emc193854.

System defined storage pools are created automaticall based on the profile of the device configurations.  How devices are selected into the defined storage pool are defined in AVM documentation.  But the document does not say about creating/deleting system defined storage pools.  The above listed document has procedure on how to upgrade internal AVM tables, and also on how to delete system defined storage pools.