Host Response; Figure 64 Host Response - Fujitsu ETERNUS AF S3 Series Design Manual

2. Basic Functions
Stable Operation

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
function that handles differences in server requirements is supported. This function can specify the appropriate
operation mode for the connection environment and convert host responses that respond to the server in the
ETERNUS AF.
In normal server connection, the recommended patterns prepared for each OS type in advance or the default
settings are used.
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-".
For details on modifying the host response settings, refer to "ETERNUS Web GUI User's Guide".
Figure 64 Host Response
Server A
ETERNUS AF
Host Response settings
for Server A for Server B for Server C
Caution
• If the host response setting is not appropriate, the volumes may not be referenceable or the expected
performance may not be achieved. Make sure to select appropriate host response settings.
• The number of LUNs that can be referenced from the host varies depending on "LUN Addressing" and
"LUN Expand Mode (Peripheral Device Addressing)" of the host response settings.
Server C
Server B
111 Design Guide