Choosing a volser instead of DFSMS

[samb01]

Hello, with DFSMS, we can't choose ourself a volser when we create a dataset.
I'm looking for an option to force the volser even if the VOLSER is in a storage groupe.
Is it somethng we can do ?

[Robert Sample]

Yes, allocate on a volume that is NOT in a storage group. By attempting to allocate to a specific volume, you are subverting the entire concept of SMS -- System Managed Storage means that the system, not you, manages where data sets are allocated. So if you want to allocate to a specific volume, you could remove that volume from the storage group (if you have sufficient authority at your site), or you can allocate to a volume not in a storage group. But if you want to allocate to a specific volume in a storage group, you're going to be frustrated.

[samb01]

Hello Robert Sample and Thank's for your answer.
So before, i will remove the voulme of the storage group and after the allocation of the dataset, i will reconnecte the volume in the Storage Group.

[enrico-sorichetti]

But if you want to allocate to a specific volume in a storage group, you're going to be frustrated.

I beg to disagree...

the GUARANTEED SPACE ATTRIBUTE lets the user choose a specific volume for allocation on SMS managed volumes
https://www.ibm.com/support/knowledgece ... guarat.htm

but ... look CAREFULLY at the sections of the manual dealing with the why the approach is discouraged
especially when dfhsm is involved
https://www.ibm.com/support/knowledgece ... bugsds.htm

[samb01]

Thank you enrico-sorichetti.
It's good to know that

[steve-myers]

You still have to watch out. SMS may grab the allocation from you unless you have an escape coded. STORCLAS=NOSMS may work.

[samb01]

With :

Code: Select all

STORCLAS=NONSMS,VOL=SER=VOLU001,

 

it dosen't work, i have this error message:

Code: Select all

        4 IGD301I DATA SET ALLOCATION REQUEST FAILED -        
 DATA SET DATASET.TEST                                
 IS NOT ELIGIBLE FOR ALLOCATION ON SMS-MANAGED VOLUME VOLU001

 

[enrico-sorichetti]

last three posts deleted and topic locked
going down the road of useless speculations