Preconfigure in the following steps to use the Storage Cluster function:
Registering ETERNUS Disk Storage Systems and License
Register ETERNUS Disk storage system
Register all the ETERNUS Disk storage systems that use the Storage Cluster function.
See
Refer to "Register ETERNUS Disk Storage System" in the ETERNUS SF Web Console Guide for the procedure to register ETERNUS Disk storage systems.
Register license
Register Storage Cluster Option License to the ETERNUS Disk storage systems registered in the above Step 1.
This license must be registered to all the ETERNUS Disk storage systems that use the Storage Cluster function.
Information
To register Storage Cluster Option License, the following licenses must be registered:
ETERNUS SF Storage Cruiser Standard Edition License
ETERNUS SF AdvancedCopy Manager Remote Copy License
See
Refer to "Register License" in the ETERNUS SF Web Console Guide for the procedure to register licenses.
Registering and Configuring Server and FC Switch
Register FC switch
Register all the FC switches that use the Storage Cluster function to devices.
See
Refer to "Register FC Switch" in the ETERNUS SF Web Console Guide for the procedure to register FC switches.
Configure Storage Cluster Controller
When using Automatic Failover, Storage Cluster Controller must be configured.
Log in not to the Web Console but to the server to configure the Storage Cluster Controller and check its settings.
See
Refer to "9.5 Storage Cluster Controller" for the procedure to configure the Storage Cluster Controller.
Register business server
Register all the business servers used for the Storage Cluster function.
See
Refer to "Register Server" in the ETERNUS SF Web Console Guide for the procedure to register business servers.
Configuring Storage Cluster Structure
Configure the structure of ETERNUS Disk storage systems required for the Storage Cluster function. The structure example is shown in "Figure 9.10 Structure Example of Storage Cluster (When Primary ETERNUS Disk Storage System is Active)".
Figure 9.10 Structure Example of Storage Cluster (When Primary ETERNUS Disk Storage System is Active)
Configure in the following steps:
Configuring Port
The Storage Cluster function uses the ports on ETERNUS Disk storage systems for the following two purposes:
The Storage Cluster function uses the synchronous transfer method to keep data equivalent between business volumes on Primary Storage and Secondary Storage. To configure REC Paths that become their copy pathways are required ports on Primary and Secondary ETERNUS Disk storage systems.
There are requirements for ports used to configure REC Paths in the Storage Cluster function as follows:
Port interface type should be "FC" or "iSCSI", however, "FCoE" is not supported.
Port mode should be "RA" or "CA/RA".
As required, change the port mode for each ETERNUS Disk storage system.
See
Refer to "Change FC/iSCSI/SAS Port Settings" in the ETERNUS SF Web Console Guide for the procedure to change Port mode.
The Storage Cluster function makes a pair of ports through which to access business servers between Primary and Secondary ETERNUS Disk storage systems. Automatically switching a port to be accessed at the time of failover/failback can continue to access business volumes.
There are requirements for ports through which to access business servers as follows:
Port interface type should be "FC", however "FCoE" is not supported.
Port mode should be "CA", however "CA/RA" is not supported.
Port parameters specified for paired ports should be the same.
When creating multipath connection, the same number of ports should be provided to Primary and Secondary ETERNUS Disk storage systems respectively so as to make a pair of all the associated ports. There should be two or more ports.
As required, change Port mode and Port parameter for respective ETERNUS Disk storage systems.
See
Refer to "Change FC/iSCSI/SAS Port Settings" in the ETERNUS SF Web Console Guide for the procedure to change Port mode and Port parameter.
Configuring REC Path
Use the ports configured in "Port for REC Path" to configure a REC Path between Primary and Secondary ETERNUS Disk storage systems. Once a REC Path is configured from either Primary ETERNUS Disk storage system or Secondary ETERNUS Disk storage system, it is set to both ETERNUS Disk storage systems. Use the following steps on the Web Console to configure a REC Path:
Click Storage on the global navigation tab.
Registered ETERNUS Disk storage systems are displayed on the Main pane.
On the Main pane, click the Name of a target ETERNUS Disk storage system.
On the Category pane, click Storage Cluster.
The items on the Category pane switch to those associated with Storage Cluster function.
On the Category pane, click REC Path.
Created REC Paths are displayed on the Main pane.
On the Action pane, click Remote Copy Setting under Wizard.
The Remote Advanced Copy Setting Wizard screen is displayed, and click Next.
The screen on which to select a remote partner is displayed.
Select an ETERNUS Disk storage system to be remote copy destination, and click Next.
The screen on which to set a copy table size is displayed.
Set copy parameters for both ETERNUS Disk storage systems as copy source and copy destination, and click Next.
The screen on which to configure REC Paths is displayed.
Select Remote copy path and Connectivity type between ETERNUS Disk storage systems and click Next.
The screen on which to configure REC buffer is displayed.
Since REC buffer is not needed to use the Storage Cluster function, click Next.
The Setting Confirmation screen is displayed.
If the information is correct, click Close.
Note
The settings of REC Path line speed and compression ratio are valid only when one or more REC Paths are added. If only existing REC Paths are deleted, specified line speed and compression ratio are not set.
Configuring TFO Group
Use the ports configured in "Port for Connecting to Business Server" to configure TFO Groups between Primary and Secondary ETERNUS Disk storage systems. Once TFO Groups are configured from either Primary ETERNUS Disk storage system or Secondary ETERNUS Disk storage system, they are configured on both ETERNUS Disk storage systems. Use the following steps on the Web Console to configure TFO Groups:
Click Storage on the global navigation tab.
Registered ETERNUS Disk storage systems are displayed on the Main pane.
On the Main pane, click the Name of a target ETERNUS Disk storage system.
On the Category pane, click Storage Cluster.
The items on the Category pane switch to those associated with Storage Cluster function.
Created TFO Groups are displayed on the Main pane.
On the Action pane, click Set under TFO Group.
The TFO Group Configuration Wizard screen is displayed.
The Selection screen for ETERNUS Disk storage systems and options is displayed.
When creating a new TFO Group:
Select a remote ETERNUS Disk storage system and specify which ETERNUS Disk storage system to be Primary Storage.
When changing an existing TFO Group:
Specified Primary and Secondary Storage cannot be changed.
If Automatic Failover is not executed, select "Manual" in Failover Mode.
On completion of input, click Next.
The TFO Group Configuration screen is displayed.
Select from a list of ports for Primary Storage and Secondary Storage, one port for each storage to be paired and click Add. When deleting, select an unnecessary pair from the Port Pair List table to click Delete.
On completion of required configuration, click Next.
The Setting Confirmation screen is displayed.
If the information is correct, click Set.
Also, the number of TFO Groups creatable to a pair of ETERNUS Disk storage systems is up to two, one for each storage system in one direction. When using the Storage Cluster function bi-directionally as shown in "Figure 9.11 Structure Example of Using Storage Cluster Function Bi-Directionally", it is required to reverse Primary and Secondary Storage systems and create two TFO Groups.
Figure 9.11 Structure Example of Using Storage Cluster Function Bi-Directionally
Note
To use the Automatic Failover mode, Storage Cluster Controller is required. Refer to "9.5 Storage Cluster Controller" for the procedure to configure the Storage Cluster Controller and confirm its settings.
If a number of TFO Groups are created in a pair of ETERNUS Disk storage systems, one pair of CA ports cannot be specified for multiple TFO Groups.
The number of TFO Groups creatable to a pair of ETERNUS Disk storage systems is up to two, one for each storage system in one direction.
In multipath connection, a number of access paths (Host Affinity) may be configured for a certain LUN/Affinity group. When specifying the ports included in such access paths (Host Affinity) for a CA port pair in a TFO Group, select all the ports associated with the target LUN/Affinity group at the same time.
Configure access paths (Host Affinity) for CA ports on Secondary Storage after having configured TFO Groups. If access paths (Host Affinity) are configured for CA ports on Secondary Storage before configuring TFO Groups, at that point the volumes in Secondary Storage are recognized by business server, possibly causing a trouble.
