000-221 · Question #193
An administrator needs to update both VIO Servers in a dual VIO Server environment Prior to updating the first VIO Server, what action should be taken on the vSCSI client partitions to ensure they…
The correct answer is A. Verily that the path to the disk is active using ispath. Before taking the first VIO Server offline, the administrator must confirm that MPIO paths through the second VIO Server are active so vSCSI client partitions retain uninterrupted disk access.
Question
An administrator needs to update both VIO Servers in a dual VIO Server environment Prior to updating the first VIO Server, what action should be taken on the vSCSI client partitions to ensure they have access to the disk hosted from the second VIO Server?
Options
- AVerily that the path to the disk is active using ispath.
- BThe map of the VIO Server environment must be verified with ismap.
- CThe secondary path must be manually redesignated as the primary using chpath.
- DA snapshot of the disk on the first VIO Server must be compared with the second using viosbr.
How the community answered
(59 responses)- A83% (49)
- B8% (5)
- C3% (2)
- D5% (3)
Why each option
Before taking the first VIO Server offline, the administrator must confirm that MPIO paths through the second VIO Server are active so vSCSI client partitions retain uninterrupted disk access.
The ispath command displays the current state of all MPIO paths to virtual SCSI devices in an IBM AIX or VIOS environment. Verifying that paths through the second VIO Server are in an Enabled and Available state before the first VIO Server is taken down ensures client partitions can continue to access their disks without interruption throughout the maintenance window.
ismap displays the mapping between virtual devices and their physical backing storage, which identifies device relationships but does not confirm whether the underlying MPIO paths are currently active.
chpath modifies the state or attributes of an existing path and is only used if a path needs to be enabled or reconfigured - path state must first be verified with ispath before any corrective action is taken.
viosbr is a VIO Server backup and restore utility for capturing and replaying VIO Server configuration data, and has no function for verifying active path availability between VIO Servers.
Concept tested: VIOS dual-server MPIO path verification before maintenance
Source: https://www.ibm.com/docs/en/aix/7.3?topic=i-ispath-command
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