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Chapter 3 Functions of NEC Storage PathManager
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There are roughly four types of path state:
/1/ In use
This is the path that is currently in use. For each logical unit, there can only be one path in use.
/2/ Active
This is a path that is ready for use, and the priority given to this path is in effect.
/3/ Standby
This is a path that is ready for use, and the priority given to this path is not in effect.
/4/ Failed
This is the path that is unavailable due to failures.
Active
In use
Failures
Unavailable
Available
Standby
Figure 3-1 State transition
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Use the -getlun option of the spscmd to check the state of all paths that are managed by NEC Storage
PathManager. This will allow you to check which path is currently being used in each logical unit, which
path is experiencing failures, and the settings for load balancing. Use the command prompt to execute the
spscmd. An example of command execution will be shown below.
III-3