Power VM - Dual VIO Migration

VIOS is nothing but the AIX OS added with the additional softwares,

Single VIOS migration is a direct approach, We need to do shutdown all the VIO Clients and do the migration on the VIOS.

Dual VIOS is different since We can run the clients with the redundancy path and the network during a migration of the VIOS.

Note: We need to make sure the disk paths and NW redundancy on all the VIO clients.

Step by step Procedure for dual VIOS migration:

Considerations:
1. Make sure the control channel VLAN is same and Its health status.
2. Identify the Primary and Secondary VIO server.
3. Make sure the SEA adapter's "ha_mode" should be "auto".
4. Check all the clients disk path is redundant (atleast 2 paths and each one should come from different VIO Server).
5. IF THE DISKS IN A MIRRORED ROOTVG FOR THE VIO CLIENTS ARE COMING FROM EACH VIO SERVER AND BOTH THE DISKS HAVE A SINGLE PATH, RUN SYNCVG AND WAIT TO SYNCHRONIZE AFTER EACH UPDATE

Procedure:

1. Check VIO's sea adapter state and update the VIO Server who is in backup mode first.

To check VIO Servers state run the following script

for x in $(lsdev -Cc adapter |grep -i shared|awk '{print $1}')
do
echo $x
entstat -d $x|grep -E State
done

ent10
    State: BACKUP
ent11
    State: BACKUP


2. On the VIO Server which is in backup mode

Check ioslevel in padmin mode

Note: If any interim fixes were installed then remove that.

$ oem_setup_env

# emgr –P  -> To list the interim fixes

# emgr –r –L -> To remove the interim fixes
$ ioslevel
2.1.3.10-FP-23
Commit all the updates
$ updateios -commit
There are no uncommitted updates.

For the safer side
force  the sea adapters to backup state

chdev -dev ent10 -attr ha_mode=standby
chdev -dev ent11 -attr ha_mode=standby

Mount the remote file system , location where vio updates are kept
and use  command
updateios -accept -install -dev

reboot VIO Server after installation is complete
and accept license
$ license -accept
$ ioslevel
2.2.1.3
now change the sea adapters into auto mode again
chdev -dev ent10 -attr ha_mode=auto
chdev -dev ent11 -attr ha_mode=auto
3)Now move to the other VIO Server and change the sea adapter to standby mode

chdev -dev ent10 -attr ha_mode=standby
chdev -dev ent11 -attr ha_mode=standby

Now the adapters at the previous vio servers should be viewed as primary and the adapters at the current vio server

Now follow the same procedure to update this vio server as the previous one
after reboot and license update
change the adapter again to auto