HP 3000 Enterprise Virtual Array - Manual (Page 61)

CXO7421A
Figure 21 I/O module B
CXO7420A
Figure 22 I/O module A
Enterprise supports only dual-controller, dual-loop operation. Each controller is connected to both the I/O
module A and I/O module B in each drive enclosure.
The A and B I/O modules are functionally identical, but they are not interchangeable (see
Figure 23 for
I/O module locations). The physical differences between the modules ensure that you can install:
• The A module (1) only at the right end of the enclosure, behind drive bay 1.
• The B module (2) only at the left end of the enclosure, next to the EMU.
Enterprise Virtual Array 3000/5000 user guide (VCS 3.110) 61