Add SAS Host Group

This function creates a new SAS host group and registers which hosts are members of this group.

A host group is a group of hosts (HBAs) that are allowed to access the volume (LUN group). The Host Affinity is specified for each host group.

The Number of Host Groups and Hosts That Can Be Registered

*1	:	Total of all host groups, regardless of the interface type.
*2	:	Total of all hosts, regardless of the interface type.

Availability of Executions in the Default Role

Refer to "User Roles and Policies" for details on the policies and roles.

Host Group Setting

In this screen, input the SAS host group information, and register the host in the host group that is to be created.

There are two methods to register a host. One method is Selecting a Host from the Displayed Host List by Clicking the [Now Connected] Tab.

The other method is Inputting the SAS Address Manually by Clicking the [Manual Input] Tab.

Selecting a Host from the Displayed Host List by Clicking the [Now Connected] Tab

All of the SAS hosts that are connected to SAS and are not registered in a host group but can be recognized by the storage system (the SAS hosts are connected to the storage system or are already registered in the storage system) are displayed. Select a SAS host to be registered in a host group. After registration, the host is named automatically. Refer to "Naming Conventions for Adding Hosts" for details.

Function Description

Filter setting is a function used to display a list of only the SAS hosts meeting all the specified conditions.

No filtering is set by default. The following table shows conditions that can be specified.

Inputting the SAS Address Manually by Clicking the [Manual Input] Tab

Click the [Add] button to display the screen to add a SAS address. Directly input the SAS address for the SAS host to be registered in a host group. After registration, the host is named automatically. Refer to "Naming Conventions for Adding Hosts" for details.

Function Button

Naming Conventions for Adding Hosts

• A name is automatically added to a host with the "host group name" and a suffix number "_x" (serial numbers starting with "0").

  (Example) Host group: HOST_Group_001 (14 characters)→ Host name: HOST_Group_001_0, HOST_Group_001_1, etc.

• When the host name including the suffix number "_x" has more than 16 characters, the excess number of characters is deleted from the "host group name", starting with the last character and a suffix number "~x" will be added. Then, the name will contain only 16 characters.

  (Example) Host group: HOST_Group_ABCDE (16 characters)→ Host name: HOST_Group_ABC~0, HOST_Group_ABC~1, etc.

• When a host name including the suffix number already exists, the suffix number is increased by one (+1). The suffix number is increased by one (+1) until no host names overlap.

• The hosts, which were selected on the [Now Connected] screen, are named, and then the hosts, which were specified on the [Manual Input] screen, are named next.

• The name of the existing member host will not be changed.

Example of Changing the Host Response When Adding a Host

When a new host group "Host_G3" (host response: HR_1) is created and "Host-3" and "Host-4" are added, the host response is changed as follows:

1. The host response for Host-3 is changed from "Default" to "HR_1" (the host response for Host_G3).

2. Since the host response for Host-3 is changed, the host response for Host_G2 to which Host-3 belongs is also changed from "Default" to "HR_1".

   (The host response for Host_2, which is the member host of Host_G2, is changed from "Default" to "HR_1".)

3. Since the host response for Host-2 is changed, the host response for Host_G1 to which Host-2 belongs is also changed from "Default" to "HR_1".

   (The host response for Host_1, which is the member host of Host_G1, is changed from "Default" to "HR_1".)

The following table shows the host response after new hosts are added.

In this screen, create a SAS host group and register the host to be a member.

1. Click [Add SAS Host Group] in [Action].

2. Enter a host group name to be created, and select a host response to be assigned to the host group.

3. Add a host in the host group in the following procedures.
   • Selecting the registration target host from the list

     1. Click the [Now Connected] tab.

     2. Select a host that is to be registered from the SAS host list, and click the [Add] button.

        → A confirmation screen appears.

        Caution

        • If the SAS address is not displayed when clicking the [Rediscover] button, make sure that there is no error in the connection environment, such as the connection between the host and the switch, and the CA port settings of the storage system. If there is no error in the connection environment, contact the Support Department, or specify the SAS address manually.

        • An error screen appears in the following conditions:

          • The "Host Group Name" is not entered

          • The "Host Group Name" does not satisfy the input conditions

          • The "Host Group Name" overlaps with an existing host group name

            (Host group names cannot overlap with any other host group names, irrespective of the interface types.)

          • Nine or more hosts are registered in the host group or no hosts are registered in the host group

          • The total number of host groups has exceeded the maximum number for the storage system

          • The total number of hosts has exceeded the maximum number for the storage system

          • A host that has a LUN that cannot be referenced is added

   • Manually specifying the registration target host

     1. Click the [Manual Input] tab.

     2. Click the [Add] button.

        → The [Add SAS Host] screen appears.

     3. Manually specify the SAS address of the host to be registered, and click the [OK] button.

        → Returns to the [Manual Input] screen.

        Caution

        • An error screen appears in the following conditions:

          • The "SAS Address" is not entered

          • The "SAS Address" does not satisfy the input conditions

     4. Repeat Step b and c when registering multiple SAS addresses.

     5. After registering the host is complete, click the [Add] button.

        → A confirmation screen appears.

        Caution

        • An error screen appears in the following conditions:

          • The "Host Group Name" is not entered

          • The "Host Group Name" does not satisfy the input conditions

          • The "Host Group Name" overlaps with an existing host group name

            (Host group names cannot overlap with any other host group names, irrespective of the interface types.)

          • The multiple SAS hosts with the same SAS addresses have been registered

          • Nine or more hosts are registered in the host group or no hosts are registered in the host group

          • The total number of host groups has exceeded the maximum number for the storage system

          • The total number of hosts has exceeded the maximum number for the storage system

          • A host that has a LUN that cannot be referenced is added

4. Click the [OK] button.

   → Registration of the SAS host group starts.

5. Click the [Done] button to return to the [Host Group] screen.
   Note

   • Click the [Continue] button to continue registering SAS host groups.