Defining Host Group - IBM System Storage DS3500 Introduction And Implementation Manual

Draft Document for Review March 28, 2011 12:24 pm
Notice, that the host W2008_server is defined as a member of the host group
W2k_Cluster_02 in our example, and the logical drive is mapped to the host group. As
mentioned before, the logical drive mapped to the host group is automatically mapped to
all hosts included in this host group. You can check it by selecting the host icon in the tree.
You can continue creating other hosts or host groups and you can map other logical drives
to them. While you can create multiple partitions, you can only map logical drives to
partitions up to the maximum number allowed by your specific storage subsystem and the
premium feature configuration.
On other side, even if a logical drive is mapped to host group with several hosts, only one
storage partition is needed for the host group.
Note: You need to use only one storage partition per host group, even if you have more
hosts in this host group. But, if some of the hosts must have exclusively assigned one
particular logical drive, that could be not shared by other hosts in this host group (for
example SAN boot drive), you need to use another storage partition for this logical drive
and host.

11.4 Defining Host Group

Since the host groups and hosts can be created together, with the Define Host wizard, there
may not be a need to define the host groups from outside the wizard. But you still have an
option to do it and it is possible to start by creating a empty host group definition, then
continue with the host definition inside the host group. The opposite sequence is also
possible, you can first define standalone hosts, and later you can define a host group and add
defined hosts into it during host definition.
Its also possible to move already defined hosts into the already defined host groups, and then
you can also move mapping from host to the host group. We describe moving hosts and
mapping change on the end of this chapter (11.8, "Move, Remove and Rename Host" on
page 300 and 11.10, "Change and Remove Mapping" on page 302).
Define a host group by performing the following steps:
1. Right-click Default Group and select Define Host Group, as shown in Figure 11-18 on
page 296.
7914Admin_Mappings.fm
Chapter 11. Administration - Mappings Tab
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