IBM Elastic Storage System 3500 Service Manual page 38

# mmvdisk nodeclass list
b. Display the state of the nodeclass associated with the ESS 3500.
# mmgetstate -N <node class name>
c. If canister B/2 is currently designated as a quorum node, move the quorum to a different node.
i) To determine which nodes are quorum nodes, issue the following command:
# mmlscluster
ii) To evaluate quorum status, issue the following command:
# mmgetstate -s
iii) If necessary, to designate a different node to be a quorum node, issue the following command:
# mmchnode –quorum -N <node name>
iv) If necessary, to remove a quorum node from canister B/1, issue the following command:
# mmchnode –noquorum -N ess32005b
11. Customer task: Unmount file systems that are mounted on canister B/2.
Unmount GPFS file systems from canister B/2:
# mmumount <file system name> -N <node name>
or you can unmount all file systems at a time from canister B/2.
# mmumount all
12. Customer task: Shut down GPFS only in canister B/2.
# mmshutdown -N <node name>
13. SSR task: Remove canister B/2 from the enclosure.
Record the high speed and management network cabling to canister B/2. After adapter MES is done,
the network cabling needs to be done as recorded here.
Disconnect high speed and management network cables from canister B/2 ONLY and remove the
canister from the slot of the enclosure.
Note: Do not unplug power cables to either PSU.
14. SSR task: Install the hardware – add an adapter to the available slot in canister B/2.
Remove top cover of canister B/2 and install one or more adapter pairs to the remaining available
slots. Please follow the placement priority carefully in the Prerequisites section above based on the
types of adapter pairs to be installed in this MES.
15. SSR task: Insert canister B/2 into the enclosure again and do basic checks.
a. Put back the top cover of canister B/2 and insert it back to its original canister slot.
b. Reconnect original high speed and management network cables.
c. Connect the new high speed cables to the new adapter if provided by the customer.
d. Perform basic checks via the technician port in canister B/2 using the essserv1 service ID.
e. Perform the following checks in the ecotels menu:
i) Option 2. Quick storage configuration check
ii) Option 3. Check enclosure cabling and paths to disks
28 IBM Elastic Storage System 3500: Service Guide
-N <node name>