Deleting a File Pool

This chapter applies to all types of file pools, except where specifically noted.

To delete a file pool from your system, do the following:

  1. Inform users of impending deletion (not applicable to CRR or FIFO file pools).

    They should have ample time to move data elsewhere. They may also need to change profiles, application programs, or execs. Do not forget to inform remote users of the file pool, if any.

  2. Ensure the CRR recovery server log name tables remain current by erasing the entry which relates to the file pool. See CRR Log Name Table Management for further information.
  3. Update IPL statements in user directories (not applicable to CRR file pools).

    After everyone is prepared, remove the FILEPOOL operand from the IPL control statement in the z/VM® system directory entries of the file pool users.

  4. Format all the file pool minidisks.

    To avoid any possibility of future unauthorized access to file pool data when the minidisks are reassigned, enter a CMS FORMAT command for every file pool minidisk.

  5. Remove the AUTOLOG1 entry.

    Most servers are set up so they are automatically logged on when z/VM is started. To undo this, remove the AUTOLOG command for the appropriate server machine from the PROFILE EXEC of the AUTOLOG1 virtual machine.

  6. If your file pool is available to other processors, your installation may have created a communications directory. If so, update the communications directory (SCOMDIR NAMES). Then enter the SET COMDIR RELOAD command to put the changes in effect. You should inform remote administrators that they should also update their communications directories. For more information about the SET COMDIR command see z/VM: CMS Commands and Utilities Reference. For more about the use of communications directories see z/VM: Connectivity.
  7. If you used an external security manager for the file pool, update the authorizations of that security manager, as appropriate (not applicable to CRR file pools).
  8. Delete server z/VM system directory entries.

    Now delete the z/VM system directory entry for the server machine that owned the file pool minidisks. Note the physical allocations on the MDISK statements. These minidisks can now be used for other purposes.

  9. Eliminate any tape backups (not applicable to dedicated CRR or FIFO file pools).

    Optionally destroy any tape backups of the file pool contents.