HP Storage Essentials NAS Manager Software - Manual (Page 145)

Storage Essentials 5.1 User Guide 113
If a switch has more than one connection to an element, the number of connections is displayed
above the line linking the switch and the element. For example, assume the number two is
shown between a switch and a storage system. This means the elements have two connections
to each other. To view the port details for the connection, right-click the element and select
Show Port Details from the drop-down menu. If the topology changes, you can update how the
element is viewed in the topology by selecting the element and clicking the Get Topology for
Selected button in the Get Topology for discovered elements page (Tools > Storage
Essentials > Home
> Discovery > Topology). The management server obtains just enough
information about where the element is connected in the topology, for example a switch
connected to a host.
The management server marks an element as “discovered” in the topology if the management
server discovers an element but it cannot obtain addition information about it. To learn more
about fixing discovered and/or disconnected elements, see the topic, ” Troubleshooting
Topology Issues ” on page 665.
Step D - Obtain Details
Get Details or Discovery Data Collection must be performed before you can do provisioning
and/or obtain provisioning information, such as data about zone sets and LUN numbers.
Keep in mind the following:
• Obtaining details takes some time. You might want to perform this process when the network
and the managed elements are not busy.(SE Discovery only)To obtain a picture of device
connectivity quickly, click the Get Topology button on the Topology tab.
• During Get Details/Discovery Data Collection the topology in System Manager is recalculated.
While the topology is being recalculated, the loading of the user interface in Storage Essentials
may be slow.
• If you want to monitor and manage backup servers, select Include backup details. If you also
want to manage and monitor the host itself, select Include infrastructure details; otherwise,
the host appears as a generic element in the topology in System Manager.
• If Get Details/Discovery Data Collection includes an AIX host, the system log displays three
SCSI errors (2 FSCSI error and 1 FCS error) per IBM adapter port. You can ignore these errors.
• You can quarantine elements to exclude them from Get Details/Discovery Data Collection. See
” Placing an Element in Quarantine ” on page 100 for more information. Let us assume you want
to discover all the elements in a discovery group, except for one. Perhaps the element you want
to quarantine is being taken off the network for maintenance. You can use the quarantine
feature to exclude one or more elements from discovery.
• When an element in a given discovery group is updated, its dependent elements are also
updated. For example, assume Host_A is the only element in Discovery Group 1. Host_A is
connected through a switch and storage system. When you Get Details/Discovery Data
Collection for Discovery Group 1, you also obtain details from the switch and storage system.
• If the management server unable to obtain information from a UNIX host during Get
Details/Discovery Data Collection as a result of a CIM Extension hanging, the management
server places the access point where the CIM Extension is located in quarantine. The
management server then moves onto getting details for the next element in the Get
Details/Discovery Data Collection table. These UNIX hosts appear as missing until they are