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Chapter 9 Connectivity Management
9.1 Connectivity Status
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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Detailed information of the LUN groups can be displayed from the following screens:
• Host Affinity Detail
• Host Group Detail
• LUN Group Detail
• LUN Group : LU QoS Group Detail
• Host-LU QoS Performance Information
9.1.1 Structures for Host Connection
This section describes structures for host connection.
• Host Group
A host group combines HBAs of the hosts that access the same LUN group into a group (HBAs configure the
multipaths). HBAs in multiple hosts can be configured in a single host group. Once a "host group" is
created, the settings for hosts (HBAs) in the group can be changed at the same time by changing the "host
group" settings. This simplifies the settings that are required to be set for each host (HBA), improving
operability.
• CA Port Group
A CA port group is a group of ports with the same port settings. A CA port group is configured with ports
that access the same LUN group, such as ports that are used for multipath connection to the server or for
connecting to the cluster configuring server. A single CA port group can be connected to multiple host
groups. Once a "CA port group" is created, multiple ports can be selected at the same time for "9.2.1.1
Create Host Affinity" (page 414) and "9.2.1.3 Modify Host Affinity" (page 428). This simplifies the settings
that must be set for each port, improving operability.
• LUN Group
A LUN group is a group of LUNs that is accessed by the same host group and the same CA port group. A LUN
group, which was previously referred to as an "affinity group", is mapping information for LUNs and
volumes.
• Host Affinity
The host affinity settings specify associations between a "host group", a "CA port group" and a "LUN group".
The new host affinity settings enable the "host affinity setting" function and "LUN mapping" function,
which were previously set separately, to be set together. "ON" and "OFF" for the affinity mode is changed by
specifying or not specifying the host group that is to be accessed.
For an ETERNUS DX Disk storage system with firmware version V10L50 or later, a host affinity that associ-
ates "host", "CA port", and "LUN group" can be created without creating a "host group" or a "CA port group".
Use the procedure that does not create a host group (select "Use "Add Host"") only if the previous procedure
for registering hosts in older storage systems (such as the ETERNUS DX410/DX440 or the ETERNUS DX8100/
DX8400/DX8700) is used.