Adding and removing paging space devices to and from the shared memory pool

After you create the shared memory pool, you can add and remove paging space devices to and from the shared memory pool by using the Hardware Management Console (HMC).

1. In the navigation pane, expand Systems Management and click Servers.
2. Select the server on which the shared memory pool is configured.
3. From the Tasks menu, click Configuration > Virtual Resources > Shared Memory Pool Management.
4. In the Pool Properties window, click the Paging Space Devices tab.
5. Click Add/Remove Devices. The Shared Memory Pool wizard is displayed.
6. Follow the steps in the Shared Memory Pool wizard to add and remove paging space devices to and from the shared memory pool.
   Note: Paging space devices can only be assigned to one shared memory pool at a time. You cannot assign the same paging space device to a shared memory pool on one system and to another shared memory pool on another system at the same time.
   Tip: If you expect to see a particular device on the list of eligible devices to add to the shared memory pool, but the device does not appear, you can run the prepdev command from the VIOS command line. You can run the prepdev command to determine why the device does not meet the requirements for paging space devices and to learn what tasks need to be performed on the device to satisfy the requirements.

   If a device was used by a logical partition and then the logical partition was removed, the device might not meet the requirements for a paging space device, even though the logical partition was removed. The prepdev command detects this situation and provides instructions about how to change the device so that it meets the requirements for a paging space device.