User`s guide

128 Implementing an Open IBM SAN
Selecting the disk groups for the volume placement
By clicking on a port, we can now see the storage that we can use to define
volumes on. This is shown in Figure 2-67.
Figure 2-67 Add Volumes (1 of 2) panel with disk group status shown
There are different colors to indicate which state the disk groups are in. In our
case, none of the four disk groups that we configured contains an ESS logical
volume. This is indicated by a green color. Only disk groups that contain
unallocated storage can be used to add volumes.
In Figure 2-67, no disk group has been manually selected by us. This means that
all of them are automatically selected for the next step of the process of defining
and assigning volumes. Which disk groups are selected is shown in the
Information window of the panel. However, we mark the two disk groups for use
in the next step by clicking on these. This highlights them with a border, as
shown in Figure 2-68.
Figure 2-68 One disk group selected