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Chapter 9 Connectivity Management
9.2 Functions in the Action Area for Connectivity
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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• Asymmetric / Symmetric Logical Unit Access
Select the access type from the host to a volume.
- ACTIVE-ACTIVE / PREFERRED_PATH
When multiple paths are used for connection between the host and the ETERNUS DX Disk
storage system, there are recommended paths and non-recommended paths. While the volume
can be accessed by using either type of path, if a non-recommended path is used, the responses
to the host may require a longer period of time.
- ACTIVE / ACTIVE
When multiple paths are used for connection between the host and the ETERNUS DX Disk
storage system, any paths can be used equally.
• iSCSI Discovery Reply Mode
Select the reply mode for the iSCSI Discovery request.
- All - Reply All Ports (Default)
Replies to the server with the information for all the iSCSI ports (iSCSI names and IP addresses).
- Port - Reply Target Port Only
Replies to the server with only the information for the specified iSCSI ports (iSCSI names and IP
addresses).
• TPGS Mode
Select whether to enable or disable the Target Port Group Support (TPGS) mode.
- Enable (Default)
- Disable
When "ACTIVE / ACTIVE" is set for the ETERNUS DX80 S2/DX90 S2, the ETERNUS DX410 S2/DX440 S2,
or the ETERNUS DX8100 S2, the load balancing function of the multipath software in the server
may perform data transfer between controllers. This may cause a reduction in performance.
When connecting the Citrix XenServer and the iSCSI port, select "Port - Reply Target Port Only".
The "TPGS Mode" setting is applied only when "Version 5 (Default)" is selected for the "Inquiry
Standard Data Version" setting. When a value other than "Version 5 (Default)" is selected, the host
response setting completes successfully but the "TPGS Mode" setting is not applied for the ETER-
NUS DX Disk storage system.