Host Response; Figure 74 Host Response - Fujitsu ETERNUS DX500 S4/DX600 S4 Design Manual

3. SAN Functions
Stable Operation via Load Control

Host Response

The response from the ETERNUS DX 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 DX.
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 74 Host Response

Server A
ETERNUS DX
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.
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
Server C
Server B
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