Dell PowerEdge T110 II - Manual (Page 13)

Oracle Database Migration to Dell PowerEdge 12 th Generation Servers and Dell Compellent Storage
Systems
13
11. Remove zoning to Dell|EMC disks from the McData switches.
12. Detach Dell|EMC storage from McData switches. See Figure 4.
Figure 4. Detach Dell|EMC storage from the source database configuration
Near Zero Downtime Oracle Database Migration to New Infrastructure and
Operating Systems
Another use case of the Oracle ASM disk rebalance feature is for the migration scenario depicted in
Figure 1. Unlike the migration scenario in Figure 2, the Oracle database is migrated to a completely
separated infrastructure with newer storage, servers, SAN switches, as well as, a newer release of
operating systems running on the database servers. The use of Oracle ASM rebalance in this type of
migration is less familiar to most administrators. The following sections provide a detailed discussion
of a near zero downtime migration methodology developed and tested by Dell engineers.
Preparing the Target System
The target database volumes must be of equal or larger size than the source database volumes. Table
3 shows the Compellent volume configurations that are similar to the source database volumes shown
in Table 2.
NOTE: The ASM disks must be named differently than the source database; otherwise, the ASM disk
rebalance will not work in a later step.