-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Dean Montevago
Sent: Friday, December 22, 2006 11:12 AM
To: [email protected]
Subject: Max Allocation w/ Space= DD

Hi,
What's the max number of cyl's you can specify for primary/secondary
allocations ? I have mod-9's in an SMS pool and tried
SPACE=3D(CYL,(4000,4000),RLSE) and received an E37-00 Extend failed
04034379. The 4379 (17273 dec) says, Allocation failed for all volumes
selected for the data set. I searched some of the manuals and can't seem
to locate anything. Then again it was our Holiday Party last night, and
the fog is a bit thick today.
TIA & Happy Holidays to All.....
Dean=20

<SNIP>

>From my z/OS 1.7 JCL REF:

-----

The size of a data set is limited to 65,535 tracks per volume except for
the following types of data sets: 
- Hierarchical File System (HFS) 
- Extended format sequential 
- Partitioned data set extended (PDSE) 
- VSAM - Large format 

-----

There is also LBI (Large Block Interface), and if this bit is turned on
(in the Format 1 DSCB?), then it may also exceed the 65,535 (64K) Track
limitation.

Note this is MAX tracks on A VOLUME, period (that's all primary and
secondary extents combined).

Now, with SMS and DSNTYPE=LARGE, etc., the 64K track limitation is
removed (as listed above).

Later,
Steve Thompson

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