Chapter 11. External storage virtualization 645
11.2 Working with external storage
This section describes how to manage external storage by using an IBM Storwize V5030.
The basic concepts of managing an external storage system are the same as the concepts for
managing internal storage. The IBM Storwize V5030 discovers LUNs from the external
storage system as one or more MDisks. These MDisks are added to a storage pool in which
volumes are created and mapped to hosts, as needed.
11.2.1 Adding external storage
To add external storage systems to the IBM Storwize V5030 virtualized environment,
complete the following steps:
1. Zone a minimum of two and a maximum of 16 Fibre Channel ports from the external
storage system with all eight Fibre Channel ports on the IBM Storwize V5030 system. For
more information about zoning, see 11.1.2, “SAN configuration planning” on page 642.
Because the IBM Storwize V5030 is virtualizing your storage, hosts need to be zoned with
the Storwize V5030 controller’s WWPNs.
2. By using the storage partitioning or LUN masking feature of the external storage system,
create a group that includes all eight IBM Storwize V5030 WWPNs.
3. Create equal size arrays on the external system by using any RAID level except zero.
4. Create a single LUN per RAID array.
5. Map the LUNs to all eight Fibre Channel ports on the IBM Storwize V5030 system by
assigning them to the group that was created in step 2 on page 645.
6. Verify that the IBM Storwize V5030 discovered the LUNs as unmanaged MDisks. To get to
the external storage pool panel, select External Storage from the Pools menu as shown
in Figure 11-2.
Figure 11-2 Selecting the external storage
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