Chapter 3 Functions of NEC Storage PathManager
LUN0
LUN1
Path
0
Path1
LUN0
LUN1
Path0 Path
1
? ?
Failures
? ?
Recovery
Figure 3-9 Failover (left) and failback (right)
Standby
In use
Failures
Unavailavle
Available
Active
Figure 3-10 Failover as a result of failure avoidance
Standby
In use
Failures
Unavailable
Available
Active
Figure 3-11 Failback as a result of failure recovery