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Chapter 11. External storage virtualization
This chapter describes how to incorporate external storage systems into the virtualized world
of the IBM Storwize V5030. A key feature of the IBM Storwize V5030 is its ability to
consolidate disk controllers from various vendors into storage pools. By virtualizing vendors
disk controllers, the storage administrator can manage and provision storage to applications
from a single user interface and use a common set of advanced functions across all of the
storage systems under the control of the IBM Storwize V5030.
A distinction must be made between virtualizing external storage and importing existing data
into the IBM Storwize V5030. Virtualizing external storage means the creation of logical units
with no data on them and the addition of these logical units to storage pools under the IBM
Storwize V5030 control. In this way, the external storage can benefit from the IBM Storwize
V5030 features, such as Easy Tier and Copy Services.
When existing data needs to be put under the control of the IBM Storwize V5030, it must first
be imported as an
image mode volume. It is strongly recommended to copy the existing data
onto internal or external storage that is under the control of the IBM Storwize V5030 instead
of letting the data within an image mode volume, so the data can benefit from the IBM
Storwize V5030 features.
Specifically, this chapter provides information about the following topics:
Planning for external storage virtualization
Working with external storage virtualization
Note: External storage virtualization is available on the Storwize V5030 model only. It is
not available on the Storwize V5010 or Storwize V5020. However, these models can still
import data from external storage systems. For more information about storage migration,
see Chapter 7, “Storage migration” on page 349.
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