I prefer to just use the PDS tool (from the CBT Tape) to add an extent to the 
dataset (as long as it is not already in 16 extents).  If it is already in 16 
extents, then you may be able to compress it and release any unused extents - 
and then add a large extent.
 
I also use PDS to add directory blocks to a target dataset, if the directory is 
full.

>>> "Staller, Allan" <[email protected]> 7/22/2009 1:47 PM >>>
1) Create the new dataset, copy and load.
2) Uncat the new dataset
3) rename the original dataset on the ALTERNATE RESVOL with volser
reference
   a) expect dsn in use conflict message. Reply to proceed.
   b) if using ISPF you will see: "Enter new name below:  (The data set
will not be cataloged.)"
4) rename the new dataset on the ALTERNATE RESVOL with volser reference
   a) b) if using ISPF you will see: "Enter new name below:  (The data
set will not be cataloged.)"
5) Recat the original name if needed.

The key to this process is working with the datasets by VOLSER, not
CATREF.

Most SYSRES datasets are not referenced after IPL. It will make you feel
better allocate the datasets on the running system to a job that will
execute for the duration expected for this activity (typically < 1 min
while DSN's are being renamed), while you manipulate the "new versions".

As long as the dataset is intact on the "running" system, existing jobs
will be fine. The copy can usually be manipulated at will with
appropriate security authorization. I have had this occur many times.
Just be very careful to only manipulate the copy, not  the original
dataset.

HTH,
<snip>
Allan, the problem is that the datasets are on the target res vol with
the same name as the dataset on the currently running res vol and they
are catalogged in the master cat. Eg. sys1.serblink, isf..sisfload. I
can iebcopy them to new bigger datasets with new names on the target res
vol but I can't rename them or the current live master cat will be
fubarred.
</snip>

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