Either because of choice or necessity, there are times when the data set being restored needs to have some of its attributes modified. This can be particularly true when restoring to an unlike device type, where the cluster define can fail due to restrictions in buffer space and control interval size. By specifying sysparm VSATTRIB with a value of Y, CA Disk will ignore the original buffer space and control interval size values that were defined with the cluster and will allow Access Method Services to calculate new values for these parameters.
In addition, the user can code an exit named VSATTREX. This exit not only allows the user to change the buffer space and control interval size, but it also allows the changing of certain attributes. The most notable of these allows the user exit to define the cluster as either UNIQUE or SUBALLOCATED, regardless of its original value. Specifying them on the restore command can also explicitly change the attributes mentioned previous, along with many others.
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