Change the GPFS tiebreaker disk by running the following commands as the root user:  Exit maintenance mode by running the following commands as the root user:  Start the DB2 instance by running the following command as the DB2 instance user:  Change the TSA tiebreaker disk by running the following command as the root user:  Check the current TSA tiebreaker disk by running the following command as the DB2 instance user or   the root user: Multiple disks can be added to file systems by running one command, and multiple commands   against multiple file systems can be run in parallel. In the process of adding disks to a GPFS file system, there might be a delay when the applications   access the file system during the allocation of disk maps. Depending on the storage vendor product, GPFS rebalancing might happen when you add disks. You   must confirm whether the GPFS rebalancing was done to the new disks; if not, the GPFS rebalancing  must be done manually. Summary Changing the TSA tiebreaker disk # db2cluster -cfs -set -tiebreaker -majority The quorum type has been successfully change to GLYPH<145>majorityGLYPH<146>. # db2cluster -cfs -set -tiebreaker -disk /dev/hdisk151/ The quorum has been successfully changed to GLYPH<145>diskGLYPH<146>. # db2cluster -cm -exit -maintenance -all Host GLYPH<145>hostname1GLYPH<146> has exited maintenance mode. Domain  GLYPH<145>db2domain_20130718132645GLYPH<146> has been started.  # db2cluster -cfs -exit -maintenance -all  The shared file system has successfully exited maintenance mode. $ db2start instance on hostname1 $ db2start instance on hostname2 $ db2start $ db2cluster -cm -list -tiebreaker   The current quorum device is of type Disk with the following specifics:  DEVICE=/dev/hdisk2. # db2cluster -cm -set -tiebreaker -disk /dev/hdisk200 Configuring quorum device for domain GLYPH<145>db2domain_20130718132645GLYPH<146> GLYPH<133> Configuring quorum device for domain GLYPH<145>db2domain_20130718132645GLYPH<146> was  successful. Consider the following points: Complete the following steps: Finally, the TSA tiebreaker disk should be changed to a disk from the new EMC storage. This work can be  done while the DB2 pureScale cluster is online. In the scenario, a new disk that is named hdisk200 from  EMC storage is set as new TSA tiebreaker. Changing Physical Disk Storage in IBM DB2 pureScale: A Practical Example 7