Chapter 5 Configuration Menu
> 5.4 Host Interface Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
328 Copyright 2010 FUJITSU LIMITED
P2X0-0760-02ENZ0
The following explains Set Host World Wide Name(s) procedures.
The following settings are available.
Add WWN
Delete WWN
Change Host Response
Procedures for each operation are described below.

5.4.2.1 Add WWN

This section explains procedures to add WWN.
Procedure
1 Click [Set Host World Wide Name(s)] under the Host Interface Management in
the [Configuration] menu.
The [Set Host World Wide Name(s) (Initial)] screen appears.
Refer to "A.19.1 Set Host World Wide Name(s) (Initial) Screen" (page 756) for screen
details.
When the host and the ETERNUS DX400/DX8000 series are connected
via FC-CA, there are two methods to have the host recognize the
Logical Volumes of the ETERNUS DX400/DX8000 series. One is [Set
LUN Mapping], and the other is the Host-Affinity function, which requires
[Set Host World Wide Name(s)], [Set Affinity Group], and [Allocate Host-
Affinity Group]. The [Affinity Mode] of [Set CA Parameters] set in every
FC-CA Port determines which function to use. If [Affinity Mode] is [ON
(Enabled)], the Host-Affinity function is enabled, whereas [Set LUN
Mapping] is enabled if [Affinity Mode] is [OFF (Disabled)].
The Host-Affinity function is a device security function for open system
servers which is supported by Fibre Channel CAs (FC-CA) and iSCSI-
CAs. Not only [Set Host World Wide Name(s)] but also [Set Affinity
Group] and [Allocate Host-Affinity Group] are required in order to use
the Host-Affinity function with FC-CA.
If appropriate Host Response is not registered in the ETERNUS DX400/
DX8000 series, register a Host Response using the [Set Host
Response] function.
When a server-side FC card is changed, the WWN must also be
changed. If the WWN is being used by the Host-Affinity function, first
delete the link between the WWN and the Affinity Group via the
[Allocate Host-Affinity Group] menu, then delete the old WWN and add
the new WWN via the [Set Host World Wide Name(s)] menu. Finish by
creating a link between the new WWN and the Affinity Group via the
[Allocate Host-Affinity Group] menu.
Host access must be stopped while the FC card is being changed.