Robert,

I believe the SAS comment is referring to extended format data sets
which is an older form of sequential data sets which also supported >64K
tracks, but which was incompatible with EXCP, as SAS has mentioned. The
new support does require some changes to EXCP programs, but they can
support >64K tracks now.

Tom Harper
NEON Enterprise Software, Inc.  

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On
Behalf Of Robert Bardos
Sent: Tuesday, April 17, 2007 8:41 AM
To: [email protected]
Subject: Re: Maximum PS dataset size

Thanks, Tom,

searching support.sas.com for 'extended format dataset' I found
the following SAS note (from July 2003) which still seems to be
valid:

<quote>
In Version 8 of the SAS System, extended sequential data set
format
cannot be read or written using EXCP (Execute Channel Program)
processing on disk.  As a result, SAS data libraries in that
format are
not supported.   This is not a SAS issue.  IBM has made a
deliberate
design and decision not to provide EXCP support for extended
sequential
data sets on disk.

Since SAS uses EXCP to process direct access bound libraries, the
direct
access bound libraries may not reside in extended format
sequential data
sets. Consequently, a direct access bound library may occupy at
most 64K
tracks on any given volume.
</quote>

So the maximum for SAS libraries would be around 210 GB?
Anybody ever encountered a SAS library similarly large? (Mine max
out at some 15GB).

Thanks again
Robert

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