Dual Domain Cabling Diagrams With D2000/D3000 Disk Enclosures - HP StoreEasy 1000 Administrator's Manual

Figure 31 Daisy Chain Connection of D6020 with P441 Controller

Dual domain cabling diagrams with D2000/D3000 Disk Enclosures

In dual domain configurations with the D2000/D3000 Disk Enclosures, you have the option of
cabling for best fault tolerance or best performance.
Figure 32 (page 46) illustrates best fault tolerance, which provides the best data protection in
the event of an I/O module failure. The disk enclosures are put into two groups of four disk
enclosures each. There is always one path to the disk enclosure from the controller (from either
the top disk enclosure in the group or the bottom disk enclosure in the group). The green path
carries the data if the blue path is broken. Besides a controller failure, the worst case scenario
is losing access to one I/O module if an I/O module fails. Figure 32 (page 46) also illustrates the
SAS daisy chain between disk enclosures.
Cabling HPE StoreEasy 1000 Storage 45