The DB2 pureScale system diagram that is shown in Figure 1 describes the migration of disks that include  logs and data in to a new physical storage hardware.  The basic steps are based on the IBM Technote “Changing physical disk storage of GPFS file system"  (found at  http://www.ibm.com/support/docview.wss?uid=swg21633330). This web doc provides more  details that help to answer the following questions: Note: Elapsed times vary depending on the system resources and configuration. All the elapsed time  information that is provided in this web doc is for reference only.  In this scenario example, we use an IBM DS8000® storage system as the source storage system and  EMC DMX as the destination storage system. The following sections describe the steps to take after you attach new EMC storage to DB2 pureScale  cluster hosts. Can you add or remove multiple disk physical volumes by using one command?  What is the potential impact of adding disks during an online transaction?  Does GPFS file system auto-rebalancing happen automatically?  How do you monitor the rebalancing status of a GPFS file system?  What are the expected outputs of each step and the corresponding estimated elapsed time?   How do you change GPFS and the TSA tiebreaker disk? Is it possible to implement this task while the   system is online? Changing Physical Disk Storage in IBM DB2 pureScale: A Practical Example 2 Figure 1. Physical disk storage change scenario diagram