There is another approach that Carl Youngren explained in Bit Bucket
X'15'. It's also my all time favorite Bit Bucket topic. Here is the
content of the foils:

The JES2 SPOOLDEF VOLUME parameter defines the prefix for Spool volumes 

A common choice is SPOOL which limits the number of volumes to 39 (0-9,
A-Z, @, #, and $)

Value stored in the Checkpoint

Changing it requires a Cold Start and probably will involve a Spool
Offload.

Another alternative is to "zap" the Check Point directly

Change the SPOOLDEF value in JES2 parms

Shut down all systems in the MAS except one

Zap Checkpoint Record 3 +x'216". 5 position Volser, 1 byte length (-1)
SYS1.HASPCHKP                                         LENGTH(006DDC)

=======>                                                 RB(0000002)
 000216   E2D7D6D6 D3040040 0F987FFF 00000001   * SPOOL.. .q"..... *

 000226   00000031 01060010 67400000 00000001   * ......... ...... *  

$K10 Abend and CHKPT Reconfiguration occurs - TERM JES2, do NOT Reconfig
CHKPT

Hot start JES2.  You will get "Damaged record detected" for CHKPT. Reply
"Y" to continue

Not for the faint of heart!

Carl and his team tested this on a small system for a friend. It was
done for real at the friend's shop (MCI I think). It worked. 

It's possible that the data is in a different location in the
checkpoint. (The presentation was given in 2001). Absolutely no
guarantee is implied.

Bob Shannon

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