Making a disk pool unavailable

You can select an independent disk pool to make it unavailable (vary it off). You cannot access any of the disk units or objects in the independent disk pool or its corresponding database until it is made available (varied on) again. The pool can be made available again on the same system or another system in the recovery domain of the cluster resource group.

Important: Before an independent disk pool can be made unavailable, no jobs can hold reservations on the disk pool. See Release job reservations on an independent disk for details on determining whether jobs are using an independent disk pool and how to release the job reservations.

To make an independent disk pool unavailable using the PowerHA® graphical interface, follow these steps:

  1. In a web browser, enter http://mysystem:2001, where mysystem is the host name of the system.
  2. Log on to the system using your user profile and password.
  3. Click PowerHA in the IBM® Navigator for i window.
  4. On the PowerHA page, click Independent ASPs.
  5. On the Independent ASPs page, click Show All Others… to show any independent disk pools that are not currently highly available.
  6. Select Vary Off from the context menu of the independent disk pool that you want to make unavailable.
  7. A progress panel is displayed that shows the current step in the process.

When making a UDFS disk pool unavailable using IBM Navigator for i, messages might be generated that require a response in the character-based interface. IBM Navigator for i will not provide any indication that a message is waiting.

To make an independent disk pool unavailable using your IBM Navigator for i, follow these steps::

  1. Select Configuration and Service from your IBM Navigator for i.
  2. Select Disk Pools.
  3. Right-click the disk pool that you want to make unavailable and select Make Unavailable.
  4. Click Make Unavailable on the dialog box that is displayed to make the disk pool unavailable.

You can use the Vary Configuration (VRYCFG) command in the character-based interface to make the disk pool unavailable.

Use the Display ASP Status (DSPASPSTS) command to identify where a step is in the process.

Use the Control ASP Access (QYASPCTLAA) API to restrict the processes that have access to the ASP.

Use the Start DASD Management Operation (QYASSDMO) API to reduce the amount of time it takes to make a disk pool unavailable.