Host Response; Figure 66 Host Response - Fujitsu ETERNUS AF250 Design Manual

1. Function
Stable Operation via Load Control

Host Response

The response from the ETERNUS AF can be optimized by switching the setup information of the host response for
each connected server.
The server requirements of the supported functions, LUN addressing, and the method for command responses
vary depending on the connection environments such as the server OS and the driver that will be used. A func-
tion that handles differences in server requirements is supported. This function can specify the appropriate oper-
ation mode for the connection environment and convert host responses that respond to the server in the ETER-
NUS AF.
The host response settings can be specified for the server or the port to which the server connects. For details on
the settings, refer to "Configuration Guide -Server Connection-".

Figure 66 Host Response

Server A
ETERNUS AF
Host Response settings
for Server A for Server B for Server C
If the host response settings are not set correctly, a volume may not be recognized or the desired perform-
•
ance may not be possible. Make sure to select appropriate host response settings.
The maximum number of LUNs that can be mapped to the LUN group varies depending on the connection
•
operation mode of the host response settings.
Server C
Server B
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