Controlling allocations to extended address volumes (EAVs)

You can use the USEEAV parameter for a system on either the SETSMS command or in the IGDSMSxx parmlib member to specify whether SMS is to select extended address volumes during volume selection processing. This check applies to both new allocations and to extending data sets to a new volume. You can enter an operator command to change the value of this keyword.

Related reading

• There are a number of important implications to specifying or defaulting to USEEAV=NO, see Modifying the SYS1.PARMLIB IGDSMSxx member in z/OS DFSMSdfp Storage Administration.
• The setting for USEEAV is stored in the SSI vector table. To look at the SSI vector table, see Formatting the SSI vector table in z/OS DFSMSdfp Diagnosis.
• See also SETSMS command to alter the setting of USEEAV in z/OS DFSMSdfp Storage Administration.