Could you please advice the procedure to add DS2246 disk shelf to existing disk shelf stack with FAS8020 controllers? I have 2 disk shelf stacks totally. So I wonder the workflow on the 8020 controller, SAS connection, ACP connection, etc. Would appreciate if diagram is provided. Thanks a lot.
Your FAS8200 should have come with this poster outlining how to connect disks - but if not, it's pretty simple. On the back of each of the controllers of the FAS8200 are 4 SAS connections on the motherboard (so in a HA pair, a total of 8 - node 1 and node 2). There may also be an additional set of SAS ports in the PCI slots of the controller - if present, you will want to do a doublewide configuration
Turn on both shelves, use the button on the front to make the number flash, and set the DS460C ID to "01" (or whatever number you want, just as long as it's not the same as the DS224C).
Turn both shelves off and then on again
Connect SAS port 0a from node 1 to port 1 of the left IOM of the DS224C (IOM A).
Connect SAS port 3 of IOM A of the DS224C to SAS port 1 of IOM A of the DS460C (top)
Connect SAS port 3 of IOM A of the DS460C to SAS port 0d of node 2
Connect SAS port 0a from node 2 to port 1of the right IOM of the DS224C (IOM B).
Connect SAS port 3 of IOM B of the DS224C to SAS port 1 of IOM B of the DS460C (bottom)
Connect SAS port 3 of IOM B of the DS460C to SAS port 0d of node 1
If you have additional SAS ports on a PCI card, and you want to do doublewide, connect PCI SAS 'a' to port 2 of the IOMs, and then connect ports 4 to 2 on the next IOM, and finally port 4 to PCI SAS port 'd' of the other node. If you have the PCI SAS card, and you don't want to do doublewide (for example if the system wasn't supplied with enough SAS cables), then instead of connecting to port '0d' on the motherboard, connect to port 'd' on the PCI SAS card. Without the PCI SAS cards, I would not bother with doublewide.