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Step 10: Change the Allocation Bit Map on the Old Extent and Re–IPL z/VM

When your z/VM system is IPLed, CP searches for the DRCT area on all online SYSTEM volumes, in slot order, as defined in the CP SYSTEM CONFIG file. CP uses the first DRCT area it finds.

If the pack on which the old DRCT area resides is earlier in the search order than the pack on which the new DRCT area resides, CP uses the old DRCT area when a system IPL is performed. To force CP to use the new DRCT area, change the allocation bit map on the old DRCT area. Do this by executing CPFMTXA. Use the ALLOCATE function and change the allocation to PERM.

For backout purposes, we do not recommend that you reformat the old space at this time.

Bring down your z/VM system normally by using the SHUTDOWN command. Then, IPL your system and verify that CP and CA VM:Secure are using the new DRCT area by entering:

cp query alloc drct

When you are sure that CP and CA VM:Secure are using the new DRCT area, you can reformat the old directory space.