HP XP Data Shredder Software - Manual (Page 29)

Figure 7 Alternate path mode is Single mode with alternate paths in Normal and
Standby
NOTE:
External arrays with Asymmetrical Active/Active (AAA) controllers, such as the Hitachi Thunder, are
an example of Figure 7 . A notable characteristic of using AAA controller arrays as external storage
is that paths to alternate ports on the owning controller for a given external LU are seen as Normal
status, but I/O load balancing does not occur (either across controllers or across ports to the owning
controller). Paths to the non-owning external controller's ports are shown as Standby status.
External Storage XP user guide 29