IBM N Series, Hardware Manual

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Chapter 21. Hardware and software upgrades
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The storage system automatically recognizes the new expansion adapter.
21.1.3 Upgrading a storage controller head
An N series controller can be upgraded from an older hardware controller model without the
need to migrate any data (“data in place”).
For example, to replace a N5000 head with a N6000 head, complete the following steps:
1. Prepare the old controller:
a. Download and install Data ONTAP to match the version that is 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 software disk ownership is not in use, 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 the following process 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