1. D6000 disk enclosure
2. Connection between the P822 and SAS port 1 on the secondary I/O module (Drawer 2)
3. P822 controller
4. Connection between the P822 and SAS port 1 on the primary I/O module (Drawer 2)
5. Connection between the P822 and SAS port 1 on the primary I/O module (Drawer 1)
6. Connection between the P822 and SAS port 1 on the secondary I/O module (Drawer 1)
Figure 5: StoreEasy 1460 with the P822 controller in a dual domain
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. 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 red 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. The following diagram illustrates the SAS daisy chain between disk
enclosures.
Dual domain cabling diagrams with D2000/D3000 Disk Enclosures
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