IBM MAINFRAME HELP & SUPPORT FORUMS

neelima.sinha · Joined: 14 Sep 2007 Posts: 24 Location: Bangalore

More: +
Data Set Name . . . . : JLL.JLCRHSBP.INTF.JLB87

General Data Current Allocation
Management class . . : MCNOMIGN Allocated cylinders : 7,402
Storage class . . . : SCNORM Allocated extents . : 3
Volume serial . . . : IPN975 +
Device type . . . . : 3390
Data class . . . . . : PROD Current Utilization
Organization . . . : PS Used cylinders . . : 7,353
Record format . . . : FB Used extents . . . : 3
Record length . . . : 80
Block size . . . . : 27920
1st extent cylinders: 4369
Secondary cylinders : 100
Data set name type : SMS Compressible : NO

Any solution

expat · Posted: Wed Sep 03, 2008 7:52 pm Post subject:

Allocate more space, or make it multivol

neelima.sinha · Joined: 14 Sep 2007 Posts: 24 Location: Bangalore

Could you provide me a sample JCL as how to make it multi volume

expat · Posted: Wed Sep 03, 2008 7:59 pm Post subject:

VOL=(,,,n)

neelima.sinha · Joined: 14 Sep 2007 Posts: 24 Location: Bangalore

Doesn't "Volume serial . . . : IPN975 + " indicates it is a multivolume datasets

I thought it did.

Regards,
Neelima

expat · Posted: Wed Sep 03, 2008 8:00 pm Post subject:

Maybe there isn't a second volume available that can accomodate your primary space allocation.

What about using tape ?

Anuj D. · Joined: 22 Apr 2006 Posts: 2229 Location: Phoenix, AZ

Hi,
neelima.sinha wrote: Doesn't "Volume serial . . . : IPN975 + " indicates it is a multivolume datasets Probably we can not comment on this. "what does it mean" would differ shop to shop. Usually, system completion code B37 is accompanied by message IEC030I. Refer to the explanation of message IEC030I for complete information about the task that was ended and for an explanation of the return code (rc in the message text) in register 15.

Try with the earlier suggesions - VOL=(,,,n) or Tape, if problem still perssists, please post back the SYSOUT of the failed JOB.

nevilh · Joined: 01 Sep 2006 Posts: 51

Quote: Probably we can not comment on this. "what does it mean" would differ shop to shop Unlikely this is standard IBM nomenclature for multivolume . I would go with expat on this with th e limited info available

expat · Posted: Thu Sep 04, 2008 2:03 pm Post subject:

Quote: would go with expat on this with the limited info available

Yeah, very limited !!!

Looking at the dataset I would hazard a guess that it has been treated by the ILM / Space management software at the shop for extent reduction.

Again a guess given above, but this is a preallocated dataset (why on earth do people still do this ?), please, let the OS choose the best volume at any given time for read/write performance.

Also we are not informed if the dataset is being written to or modded to.

We do not know how many volumes are in the storage group. If the dataset must reside on DASD rather than tape I can only suggest using a space allocation of something like (500,200) to get a fighting chance of being able to satisfy the primary on second and subsequent volumes. In addition I would also use VOL=(,,,10) to allow up to 10 volumes for the allocation.

One can only hope that the OP will get back with his/her resolution.

gcicchet · Joined: 28 Jul 2006 Posts: 664

Hi,

just like to add 1 thing, the primary allocation is only allocated on first volume, once the dataset writes to the second volume it's the secondary space parameter that is used.

Gerry

expat · Posted: Thu Sep 04, 2008 3:06 pm Post subject:

:oops: Ooooooooooooooops, forgot that part

neelima.sinha · Joined: 14 Sep 2007 Posts: 24 Location: Bangalore

Thanks for all above response,

Ans 1: Dataset is on DASD
Ans 2: Dataset has disp=old so it is written not modded
Ans 3. I dont know how many volumes are there in a storage group. And i dont know also how to find that

for " but this is a preallocated dataset (why on earth do people still do this ?), please, let the OS choose the best volume at any given time for read/write performance"

How can this be done

expat · Posted: Thu Sep 04, 2008 6:36 pm Post subject:

By deleting the dataset before the creating step and then using DISP=(,CATLG,DELETE) in the step that creates it.

That way the least utilised channels / volumes get to do the work which helps balance usage.