Configuring VIOS

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When you add hosts to the KSYS subsystem, all Virtual I/O Servers in the hosts are also added to the KSYS subsystem. The VM Recovery Manager DR solution monitors the hosts and virtual machines by using Virtual I/O Servers in the host.

The VM Recovery Manager DR solution requires at least two Virtual I/O Servers per host. You can have a maximum of 24 Virtual I/O Servers, spread across different hosts, in a single host group. If a host has more than 2 Virtual I/O Servers, you can exclude specific VIOS partitions from the DR management.

To exclude specific VIOS partitions from the DR management, run the following command:

ksysmgr unmanage vios <viosname[,...]> | <viosuuid[,...]>
    unmanage => unman*, umg
    vios => vios*

For example:

ksysmgr unmanage vios Site2_VIOS1,Site2_VIOS2

To include specific VIOS partitions for the DR management, run the following command:

ksysmgr manage vios <viosname[,...]> | <viosuuid[,...]>
    manage => man*, mg
    vios => vios*

For example:

ksysmgr manage vios Site2_VIOS1,Site2_VIOS2

VIOS maintenance mode support

The Maintenance Mode attribute allows you to suppress specific VIOS-related events in the KSYS subsystem during planned maintenance activities such as VIOS upgrades, patching, storage reconfiguration, or migration. When Maintenance Mode is enabled for a VIOS, KSYS continues to monitor the VIOS, but does not log certain critical events, as these are expected during maintenance.

Note: By default, the maintenance mode attribute is set to no.

To view VIOS maintenance mode

To view the Maintenance mode status for a VIOS partition, run the following command:
```
ksysmgr query vios <viosname>
```

Example output:


Name:               rt01v1
Site:               HomeSite
UUID:               29EA1AC7-DE88-4304-AF9E-85862FF4CB78
Host:               rt01_8286-42A-210316W
Version:            VIOS 4.1.2.00
State:              MANAGED
Maintenance_mode:   yes

To enable maintenance mode for a VIOS, run the following command:
```
ksysmgr modify vios <viosname> Maintenance_mode=yes
```
To disable maintenance mode and resume standard event reporting, run the following command:
```
ksysmgr modify vios <viosname> Maintenance_mode=no
```

You can modify multiple VIOS partitions at once:

ksysmgr modify vios vios1,vios2 Maintenance_mode=yes

When maintenance mode is set to yes, KSYS suppresses the following events from being generated and recorded in the events.log file:

Table 1. Events
Event Type	Description
VIOS_FAILURE	VIOS failure events
VIOS_RMC_STATE_DOWN	VIOS RMC communication failure
VIOS_HOST_MON_NONRESP_DETECTED	VIOS heartbeat loss
VIOS_SLOW_IO_DETECTED / RECOVERED	Slow I/O detection and recovery events
HA_TRUNK_ADAPTER_CREATE_FAILED / DELETE_FAILED	SEA trunk adapter errors
VIOS_NODE_FAILURE	VIOS node failure
REPOSITORY_DISK_FAILURE	Repository disk failure events
HA_DISK_FAILURE	HA disk-related failures
NETWORK_INTERFACE_FAILURE	VIOS network interface failure
CAA_NODE_DOWN_EVENT	Cluster node down event
SFW_ADAP_DOWN / SFW_PORT_DOWN	Storage fabric adapter/port failures
VIOS_CAA_STATE_DOWN_DETECTED	VIOS CAA state down detected