HP StoreEasy 1000 Storage Administrator's Manual page 34

7. SAS daisy chain – port 1 of I/O module B on the top D2600 connects to port 2 of I/O module B on the bottom
D2600 and port 1 of I/O module A on the top D2600 connects to port 2 of I/O module A on the bottom D2600
8. Connection from the P822 controller to port 2 of I/O module A on the top D2600 in Group 1
Figure 29 (page 35)
tolerance cabling is that the beginning and ending connections from the controller to a disk enclosure
are always to the first disk enclosure in the group. Essentially, the request from the controller to a
disk enclosure moves faster because it does not have to travel through a series of disk enclosures.
However, this cabling does not provide fault tolerance. If an I/O module in the first disk enclosure
fails, you will lose access to all disk enclosures in the group.
NOTE: The cabling diagram in
14x0 and 16x0 using the P822 controller.
34 Installing and configuring the storage system
illustrates best performance. The difference between this cabling and fault
Figure 29 (page 35) is exactly the same for the HP StoreEasy