Be careful when using an automated storage management tool on a volume that contains the JES2 checkpoint. Because MVS™ does not record that JES2 allocated the checkpoint data set, the tool could attempt to move the data set erroneously.

Do not allow any automated storage management tool to move the JES2 checkpoint data set while the JES2 that uses it is active. You must inform the tool not to move the checkpoint data set by specifying DCB=(DSORG=PSU) on the DD JCL statement that allocates the checkpoint data set. However, this method might not work with all products.