IBM 3000 6.0.2, Service Manual

Page: 47 / 88

[root@ess3k5a ~]# mmgetstate -N ess_x86_64_mmvdisk_78E05N1
Node number Node name GPFS state
-------------------------------------------
21 ess3k5a-ib active
22 ess3k5b-ib active
c. If canister B 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 not in this enclosure’s nodeclass
iv) If necessary, to remove a quorum node from canister B, issue the following command:
# mmchnode –quorum -N canister B
11. Unmount file systems that are mounted on canister B. (Customer task)
Unmount GPFS file systems from canister B:
# mmumount fs1 -N canister B
or you can unmount all file systems at a time from canister B.
# mmumount all -N canister B
Example:
[root@ess3k5a]# mmumount fs3k70 -N ess3k5
12. Shut down GPFS only in canister B. (Customer task)
# mmshutdown -N canister B
Example:
[root@ess3k5b]# mmshutdown -N ess3k5b
13. Remove canister B from the enclosure. (SSR task)
Record the high speed and management network cabling to canister B. 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 ONLY and remove the
canister from the top slot of the enclosure.
Note: Do not unplug power cables to either PSU.
14. Install the hardware – add an adapter to the available middle slot in canister B. (SSR task)
Remove top cover of canister B and install an adapter in the 3
rd
PCIe slot that is located between two
existing adapters. For more information about these steps, see IBM Elastic Storage System 3000:
Service Guide.
15. Insert canister B into the enclosure again and do basic checks. (SSR task)
a. Put back the top cover of canister B and insert it back to its original canister slot (top).
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.
Chapter 2. Servicing 35