Hitachi XP P9500 User Manual page 25

Figure 2-5 Flow of I/O Data When the Load Balancing Function Is Not
Used
When the load balancing function is not used, I/O operations converge onto a
single path (A). The load on that one path (A) will cause a bottleneck, which
might cause problems with system performance.
2-7
HDLM Functions
Hitachi Dynamic Link Manager User Guide (for VMware(R))