Fujitsu ETERNUS AX Series Installation And Cabling Manual page 15

Procedure
1. If you want to manually assign disk ownership for the disk shelves you are hot-adding, you need to disable
disk ownership automatic assignment if it is enabled; otherwise, go to the next step.
You need to manually assign disk ownership if disks in the stack are owned by both controllers in an HA
pair.
You disable disk ownership automatic assignment before cabling the hot-added disk shelves and then
later, in step 7, you reenable it after cabling the hot-added disk shelves.
a) Verify if disk ownership automatic assignment is enabled:storage disk option show
If you have an HA pair, you can enter the command at the console of either controller.
If disk ownership automatic assignment is enabled, the output shows "on" (for each controller) in the
"Auto Assign" column.
b) If disk ownership automatic assignment is enabled, you need to disable it:storage disk option
modify -node node_name -autoassign off
You need to disable disk ownership automatic assignment on both controllers in an HA pair.
2. If you are hot-adding a stack of disk shelves directly to a controller, complete the following substeps;
otherwise, go to step 3.
a) If the stack you are hot-adding has more than one disk shelf, cable the shelf-to-shelf connections;
otherwise, go to substep b.
Table 6:
If...
You are cabling a stack with multipath HA,
multipath, single-path HA, or single-path
connectivity to the controllers
You are cabling a stack with quad-path HA or
quad-path connectivity to the controllers
b) Check the controller-to-stack cabling worksheets and cabling examples sections to see whether a
completed worksheet exists for your configuration.
c) If there is a completed worksheet for your configuration, cable the controller-to-stack connections using
the completed worksheet; otherwise, go to the next substep.
d) If there is no completed worksheet for your configuration, fill out a worksheet template, and then cable
the controller-to-stack connections using the completed worksheet.
Worksheet templates can be found towards the back of this guide.
e) Verify that all cables are securely fastened.
| Hot-adding disk shelves with IOM12 modules |
Then...
Cable the shelf-to-shelf connections as "standard"
connectivity (using IOM ports 3 and 1):
1. Beginning with the logical first shelf in the
stack, connect IOM A port 3 to the next shelf's
IOM A port 1 until each IOM A in the stack is
connected.
2. Repeat substep i for IOM B.
Cable the shelf-to-shelf connections as "double-
wide" connectivity:
You cable the standard connectivity using
IOM ports 3 and 1 and then the double-wide
connectivity using IOM ports 4 and 2.
1. Beginning with the logical first shelf in the
stack, connect IOM A port 3 to the next shelf's
IOM A port 1 until each IOM A in the stack is
connected.
2. Beginning with the logical first shelf in the
stack, connect IOM A port 4 to the next shelf's
IOM A port 2 until each IOM A in the stack is
connected.
3. Repeat substeps i and ii for IOM B.
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