HP XP External Storage Software User Guide (T1706-96018, November 2011)

Figure 5 Alternate path mode is Multi mode
Note: In Multi mode, active I/O load balancing occurs across external array ports and
controllers. The XP and EMC DMX are examples of external arrays that use Multi mode.
• Alternate path mode is Single mode.
Figure 6 (page 23) shows an example of when the alternate path mode is Single mode. When
an error occurs in the path used for I/Os, the I/O execution path switches to the path with
the second highest priority.
Note: As you restore the path with a priority higher than the current path, the I/O execution
path automatically switches to the restored path with the highest priority.
22 Preparing for XP External Storage operations