Reinstalling the Virtual I/O Server of a paging VIOS partition by using the HMC

When you reinstall the Virtual I/O Server (VIOS) that is assigned to the shared memory pool (hereafter referred to as a paging VIOS partition), you need to reconfigure the shared memory environment. For example, you might need to add the paging space devices again to the shared memory pool.

The paging VIOS partitions store information about the paging space devices that are assigned to a shared memory pool. The Hardware Management Console (HMC) obtains information about the paging space devices that are assigned to the shared memory pool from the paging VIOS partitions. When you reinstall the VIOS, the information about the paging space devices is lost. For the paging VIOS partitions to regain the information, you must assign the paging space devices again to the share memory pool after you reinstall the VIOS.

The following table shows the reconfiguration tasks that you must perform in the shared memory environment when you resinstall the Virtual I/O Server of a paging VIOS partition.

Table 1. Shared memory reconfiguration tasks for reinstalling the Virtual I/O Server of a paging VIOS partition
Number of paging VIOS partitions that are assigned to the shared memory pool	Number of paging VIOS partitions for which you want to reinstall the VIOS	Reconfiguration steps	Instructions
1	1	Shut down all logical partitions that use shared memory (hereafter referred to as shared memory partitions). Reinstall the VIOS. Add the paging space devices again to the shared memory pool.	Shutting down and restarting logical partitions Installing the Virtual I/O Server manually using the HMC version 7 Adding and removing paging space devices to and from the shared memory pool
2	1	Shut down each shared memory partition that uses the paging VIOS partition (that you plan to reinstall) as the primary or secondary paging VIOS partition. Remove the paging VIOS partition from the shared memory pool. Reinstall the VIOS. Add the paging VIOS partition again to the shared memory pool.	Shutting down and restarting logical partitions Removing a paging VIOS partition from the shared memory pool Installing the Virtual I/O Server manually using the HMC version 7 Adding a paging VIOS partition to the shared memory pool
2	2	Shut down all the shared memory partitions. Reinstall the VIOS of each paging VIOS partition. Add the paging space devices again to the shared memory pool.	Shutting down and restarting logical partitions Installing the Virtual I/O Server manually using the HMC version 7 Adding and removing paging space devices to and from the shared memory pool