Fujitsu Eternus DX60 User Manual page 42

Chapter 1 Overview
> 1.3 Functions
• Host Affinity function
The Host Affinity function sets the "Affinity Group" to be applied for each server. "Affinity
Group" defines the relationship between the host logical units (LUN) and the device logical
volumes. Multiple settings are available.
The Host Affinity function uses the server's World Wide Name (WWN), iSCSI name, or SAS
address to distinguish it from other servers.
Server A
WWN#A
Server B
WWN#B
Server C
WWN#C
Figure 1.18 Host Affinity function
When multiple servers access the device using the same port, this assigns Affinity Group for
each server.
P3AM-3042-03ENZ0 ETERNUS DX60/DX80 Disk storage system User Guide
Restrict the server
that can be accessed
per port
Apply Affinity Group #00 for the access from
LUN#0
WWN#A (=Server A) and WWN#B (=Server B)
Switch
:
LUN#127
Port
LUN#0
:
LUN#127
Port
Apply Affinity Group #01 for the access from
LUN#0
WWN#C (=Server C)
:
LUN#127
42
ETERNUS DX60/DX80
Affinity Group #00
LUN#0 Volume#0
: :
LUN#127 Volume#127
Affinity Group #01
LUN#0 Volume#128
: :
LUN#127 Volume#255
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