2-16 About Universal Volume Manager Operations
Hitachi Universal Storage Platform V/VM Universal Volume Manager User’s Guide
外部
ボリューム
: I/O
External Storage System
Legend
: Internal volume where the external volume is mapped
Local Storage System
External Storage System Local Storage System
External
Port B
Port
WWN B
Internal
Volum e External
Volume
External
Port C
Port
WWN C
Path
Priority 2
Internal
Volum e
Path
Priority 3
External
Port B
Port
WWN B External
Volume
External
Port C
Port
WWN C
Path
Priority 3
Path
Priority 1
Path
Priority 2
Port
WWN A
External
Port A
Path
Priority 1
External
Port A
Port
WWN A
Error

Figure 2-7 When the Path Mode is Single Mode

• When the path mode is Single mode and there is at least one alternate

path in the Standby status

Figure 2-8 shows an example of the case when the path mode is Single

mode, and there are the alternate paths in the Normal status and the

Standby status. Figure 2-9 shows another example of the case when the

path mode is Single mode. In the case of Figure 2-9, there are alternate

paths in the Standby status only.