Upgrading A Storage Controller Head; Software Upgrades - IBM N Series Hardware Manual

21.1.3 Upgrading a storage controller head

The model of N series controller can be upgraded from without needing to migrate any data
("data in place").
For example, to replace a N5000 head with a N6000 head, perform these steps:
1. Prepare the old controller:
a. Download and install Data ONTAP to match the version installed on the new controller.
b. Modify the /etc/rc to suit the new controller's hardware.
c. Disable clustering and shut down.
d. Disconnect the interconnect cables (if any) and the B loop connections on the first shelf
in each loop.
e. Transfer any applicable adapters to the new controller head.
f. If not already using software disk ownership, reboot to maintenance mode and enable
it now.
2. Configure the new controller:
a. Connect all expansion drawer cables EXCEPT the B loop connections on each head.
Also leave the cluster interconnect cables (if any) disconnected.
b. Boot to maintenance mode.
c. Verify that the new controller head sees only the disks on its A loops.
d. Reassign the old controller's disks to the new controller's system ID.
e. Delete the old local mailbox disk.
3. Repeat on the partner system:
a. Shut down and power off.
b. Connect the B loop cables and interconnect cables to both controller heads.
c. Reboot to normal mode.
d. Download and install the binary compatible version of ONTAP for the new controller.
e. If required, update the software licenses.
f. Reboot.
g. Enable clustering and test failover/giveback.
h. Decommission the old controller.

21.2 Software upgrades

This section provides an overview of the upgrade process for Data ONTAP 7.3 and 8.1. For
more information, see the following documentation:
Data ONTAP 7.3 Upgrade Guide
http://www.ibm.com/support/docview.wss?uid=ssg1S7002708
Data ONTAP 8.1 7-Mode Upgrade and Revert/Downgrade Guide
http://www.ibm.com/support/docview.wss?uid=ssg1S7003776
Chapter 21. Hardware and software upgrades
279