How to connect an extended cabinet with IBM ds6800 Storage

The IBM ds6800 storage can accommodate 16 Optical Fiber disks, for example, 16 4.8 GB disks with a capacity of TB. When the customer needs a larger space, they can connect 13 expansion cabinets to expand to 224 disks and get a capacity of TB.

The Cascade method is: the first loop (gray loop) connects the ds6800 internal disk and the other six disk expansion cabinets, and the second loop (blue loop) connects seven disk expansion cabinets.
The specific method is as follows:
1. In the first loop, ds6800 Controller A has two lines connected to the interface card of the first disk expansion cabinet, and ds6800 controller B has two lines connected to the B interface card of the first disk expansion cabinet. The A interface card of the first disk expansion cabinet has two lines to connect to the interface card of the second disk expansion cabinet, and the B interface card of the first disk expansion cabinet has two lines to connect to the B interface card of the second disk expansion cabinet. Other inventory cabinets are connected sequentially. As shown in.

2. in the second loop, Controller A and controller B of ds6800 are connected to the interface card of the first disk expansion cabinet, the Controller A and controller B of ds6800 each have a line to connect to the B interface card of the first disk expansion cabinet.
The reason for this connection is that each controller of ds6800 can control two interfaces, A and B, of the expansion cabinet. The first loop has a built-in disk, so it is different from the second ring.
The A interface card of the first disk expansion cabinet has two lines to connect to the interface card of the second disk expansion cabinet, and the B interface card of the first disk expansion cabinet has two lines to connect to the B interface card of the second disk expansion cabinet. Other inventory cabinets are connected sequentially. As shown in.