HP StorageWorks External Storage XP user guide for the XP12000, XP10000, SVS200 (T1706-96009, October 2007)

Figure 4 Example of incorrect alternate path configurations
Examples of switching I/O execution paths to alternate paths
There are two alternate path modes: Single mode and Multi mode. This section describes examples of
the performance when the I/O execution path switches to the alternate path for each path mode.
For more information about path status, see Adding alternate paths by selecting multiple external LUs
(Add Paths).
• Alternate path mode is Multi mode
Figure 5 shows an example of when the alternate path mode is Multi mode. When an error occurs
in one path, I/Os execute using paths other than the error path.
NOTE:
As you restore the error path, use of the restored path automatically resumes.
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Preparing for External Storage XP operations