Dell PowerEdge T110 II - Manual (Page 11)

Oracle Database Migration to Dell PowerEdge 12 th Generation Servers and Dell Compellent Storage
Systems
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alter diskgroup diskgroup_name
drop disk disk_name
rebalance power n;
For example,
SQL> alter diskgroup data
drop disk DATA_0006
rebalance power 10;
A common use case of the Oracle ASM disk rebalance feature is the Oracle database migration to a
different storage system while the database servers remain unchanged. In the migration scenario
illustrated in Figure 2 below, the source Oracle 11g R1 RAC database runs on two PowerEdge 2950
servers, Dell|EMC CX3-80 Fibre Channel storage system, and McData Fibre Channel switches. The
Dell|EMC CX3-80 Fibre Channel storage system is being replaced with the Dell Compellent storage
system, while other components in the configuration remain unchanged.
Figure 2. Oracle ASM disk rebalance to move Oracle database to a different storage system
The Oracle ASM disk rebalance feature can be effectively utilized for this type of migration scenario.
The high level steps for migration are:
1. Cable the Dell Compellent storage front-end ports to the McData switches. See Figure 3.