Modify Host Affinity

Overview

This function is used to perform the following operations to the existing host affinities.

  • Changing the "CA Port Group" allocation

  • Changing the "CA Port" allocation

  • Changing the "LUN Group" allocation

  • Changing the path between the host and the port in "CA Port Group"

  • Changing the "Host Response" allocation (only when "Host Group" or "Host" is "All")

The number of hosts that can be associated with the CA port using this function is determined based on the total number of hosts described below. Note that the maximum number of hosts is 256 (32 for the ETERNUS DX60 S5).

  • The number of member hosts in the host group that is associated with the CA port

  • The number of hosts that do not belong to the host group that is associated with the CA port

Use each functions for the following each operation.

  • Adding or deleting hosts from the host group ([Modify Host Group])

  • Adding or deleting member ports from the CA port group ([Modify CA Port Group])

  • Adding, changing, or deleting volume allocation from the LUN group ([Modify LUN Group])

  • Changing the host response that is specified for the host group ([Modify Host Group])

  • Changing the host response that is specified for the host ([Modify FC Host], [Modify iSCSI Host], or [Modify SAS Host])

Caution

  • When setting an active host affinity, make sure to stop the access of the host which has been associated with the host affinity to be set. The server must be rebooted after the host response is changed. The host response can be changed only if the host group or host is "All".

  • A host can be a member of multiple host groups. In addition, a CA port can be a member of multiple CA port groups. However, only one LUN group can be allocated to host and port combinations when changing host affinity settings.

  • The following host affinities cannot be modified by using Web GUI. To change host affinities, use the ETERNUS SF Storage Cruiser.

    • A host affinity that is used for the Storage Cluster function

    • Host affinities of which the Virtual Volume function is enabled

Note

  • When one CA port is registered in multiple CA port groups, and the host affinity setting has been configured on one of the CA port groups including the corresponding port, the same affinity mode is applied to all the CA port groups, which include the corresponding port, and also on the member ports.

  • CA port groups or CA ports without the host affinity setting can be used for creating a host affinity regardless of whether the affinity mode is enabled (ON) or disabled (OFF).

  • When a host is added to a host group with the [Modify Host Group] function, the paths between the added host and all of the CA ports in the associated CA port group are configured.

  • When a CA port is added to a CA port group with the [Modify CA Port Group] function, the paths between all of the hosts in the host group and the added CA port are configured.

  • FC host groups can be used to configure host affinity with CA port groups whose CA type is "FC".

User Privileges

Availability of Executions in the Default Role

Default role Availability of executions
Monitor  
Admin
StorageAdmin
AccountAdmin  
SecurityAdmin  
Maintainer

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

Display Contents

Target Connection Setting

The connection target selected in the [Connectivity] screen is displayed. The host affinity setting screen that is to be displayed depends on the selected connection target.

Item Description

Target Connection

The connection target that is to be changed is displayed.

Settings

Host Group - CA Port Group - LUN Group Setting

The "Host Group", the "CA Port Group", and the "LUN Group" for the selected host affinity is displayed. In this screen, specify the "CA Port Group" or the "LUN Group" for the host affinity, and modify the host affinity. Note that when the selected host group is "All (host response name)", the host response settings can be changed with this function.

Item Description Setting values

Host Group

The host group for the selected host affinity is displayed.

When the selected host group is "All (host response name)", the host response settings can be changed. Click the [Browse...] button, and select a host response on the [Select Host Group] Screen.

CA Port Group

Click the [Browse...] button, and select a CA port group to configure host affinity on the [Select CA Port Group] Screen.

CA port group name

LUN Group

Click the [Browse...] button, and select a LUN group to configure a host affinity on the [Select LUN Group] Screen.

LUN group name

Host - CA Port Connection

The path between the host and the CA port for the selected host affinity is displayed. Click the [Edit] button and edit the path between the host and the CA port.

Item Description

Host

The hosts for the selected host affinity are displayed.

When configuring a path with any hosts, "All (host response name)"is displayed.

CA Port

The location information of the corresponding host and the CA port of which a path has been configured are displayed.

Click the [Edit] button to display the [Select CA Port] Screen. Edit the path between a host and a CA port on the [Select CA Port] Screen. The "CA Port" field is updated after editing.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y CA#z Port#w

For the other models

CM#y CA#z Port#w

x: CE number

y: CM number

z: CA number

w: Port number

[Select Host Group] Screen / [Select Host] Screen

Select a host response to be assigned to any host.

Target Connection Setting

Item Description

Target Connection

"All" (any hosts) is displayed.
Item Description

Radio buttons to select a host response

Select the host response that is to be newly assigned by using the radio button.

Host Response

The host responses that have been registered in the storage system are displayed.

Default

Solaris MPxIO

HP-UX

AIX

AIX VxVM

VS850/SVC

BS2000

Host responses registered in the storage system

[Select CA Port Group] Screen

In this screen, select a CA port group to configure a host affinity.

Item Description

Radio buttons to select a CA port group

Select the radio button for the CA port group that is newly used to configure the host affinity.

Note
  • If a specific host group has been selected for "Host Group", CA port groups with any of the following conditions are not displayed:

    • The affinity mode is "OFF"

    • The CA port group is used by another host affinity

  • If "All" has been selected for "Host Group", CA port groups with any of the following conditions are not displayed:

    • The CA port group is used by another host affinity

    • Member CA ports that are being used in another CA port group

CA Port Group

The CA port group name is displayed.

Type

The CA type of a CA port group is displayed.

FC

iSCSI

SAS

Member

The location information of member ports of a CA port group are displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y CA#z Port#w

For the other models

CM#y CA#z Port#w

x: CE number

y: CM number

z: CA number

w: Port number

Affinity Mode

The affinity mode of a CA port group is displayed.

If the affinity mode is neither "ON" nor "OFF", the field is blank.

[Select LUN Group] Screen

In this screen, select a LUN group to configure a host affinity.

Item Description

Radio buttons to select a LUN group

Select the radio button for the LUN group that is newly used to configure a host affinity.

Caution
  • The range of LUNs that can be referenced from the host depends on the "LUN Addressing" and "LUN Expand Mode (Peripheral Device Addressing)" settings for the following host responses. Refer to "Host Response and Referable Number of LUNs" for details. LUN groups that use LUNs from LUN#256 onward cannot configure the host affinity with a host group or a host for which the referable LUNs is "256 LUN" host response. When "All" is selected for "Host Group" or "Host", the host affinity setting cannot be configured with LUN groups that use LUNs from LUN#256 onward.
    Host response The number of LUNs that can be referenced from a host (LUN range)
    LUN Addressing

    LUN Expand Mode

    (Peripheral Device Addressing)

    		 When "Host Group" or "Host" is selected When "All" is selected
    PRHL Disabled (Default)

    256 LUN

    (LUN#0 - LUN#255)

    256 LUN

    (LUN#0 - LUN#255)
    PRHL Enabled

    4096 LUN

    (LUN#0 - LUN#4095)

    512 LUN

    (LUN#0 - LUN#511)
    FLAT

    Disabled (Default)

    Enabled

    4096 LUN

    (LUN#0 - LUN#4095)

    512 LUN

    (LUN#0 - LUN#511)

  • If the host response whose "LUN Expand Mode (Peripheral Device Addressing)" is "Enable" or "LUN Addressing" is "Flat space addressing" is used, the maximum number of connectible hosts per CA port is 32 (or four for the ETERNUS DX60 S5).

    Therefore, make sure to connect 32 or less hosts (or four or less hosts for the ETERNUS DX60 S5) to the target CA port. If the number of connected hosts exceeds the limit, the volume may become inaccessible from any of the hosts assigned to the target CA port.

Note

  • When "All" is selected for "Host Group" or "Host", the LUN groups in which LUNs are specified from LUN#512 onward are not displayed.

  • LUN groups including volumes that are used for the Storage Cluster function are not displayed.

Name

The LUN group name is displayed.

Status

Whether the LUN group is "Active" or "Inactive" for other Host Affinity settings is displayed.

  • Active

    The LUN group is applied for other Host Affinity settings.

  • Inactive

    The LUN group is not applied for other Host Affinity settings.

Number of LUNs

The number of mappings (1 to 4096) in a LUN group is displayed.

LUN Overlap

Whether the LUN group includes volumes that are allocated to other LUN groups is displayed.

  • Yes

    At least one volume is allocated to other LUN groups.

  • Blank

    Volumes in the LUN group are not allocated to other LUN groups.

Veeam

If the LUN group is used for Veeam Storage Integration, "Yes" is displayed. If the LUN group is not used for Veeam Storage Integration, a "-" (hyphen) is displayed.

This item is displayed only when the Veeam Storage Integration License has been registered.

[Select CA Port] Screen

In this screen, edit the path between the corresponding host and a CA port.

CA Port Group

Item Description

Name

The CA port group name is displayed.
Item Description

Checkbox to select a CA port

To configure a path between the corresponding host and a CA port, select the checkbox.

To delete the path between a host and a CA port, clear the checkbox.

CA Port

The location information of a CA port is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y CA#z Port#w

For the other models

CM#y CA#z Port#w

x: CE number

y: CM number

z: CA number

w: Port number

Host - CA Port - LUN Group Setting

The "Host", the "CA Port", and the "LUN Group" for the selected host affinity is displayed. In this screen, specify the "CA Port" or the "LUN Group" for the host affinity, and modify the host affinity. Note that when the selected host is "All (host response name)", the host response settings can be changed with this function.

Item Description

Host

The hosts for the selected host affinity are displayed.

When the selected host is "All (host response name)", the host response settings can be changed. Click the [Browse...] button, and select a host response on the [Select Host] Screen.

CA Port

Click the [Browse...] button, and select a CA port to configure host affinity on the [Select CA Port] Screen.

LUN Group

Click the [Browse...] button, and select a LUN group to configure a host affinity on the [Select LUN Group] Screen.

[Select CA Port] Screen

In this screen, select a CA port to configure a host affinity.

Item Description

Radio buttons to select a CA port

Select the radio button for the CA port that is newly used to configure a host affinity.

Note
  • If a specific host group has been selected for "Host", CA ports with any of the following conditions are not displayed:

    • The affinity mode is "OFF"

    • The CA port is used by another host affinity

  • If "All" has been selected for "Host", CA ports with any of the following conditions are not displayed:

    • The CA port is used by another host affinity

    • The CA port is used in the CA port group

  • CA ports that are used for the Storage Cluster function are not displayed.

CA Port

The location information of a CA port is displayed.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

CE#x CM#y CA#z Port#w

For the other models

CM#y CA#z Port#w

x: CE number

y: CM number

z: CA number

w: Port number

Type

The CA port type is displayed.

FC

iSCSI

SAS

Affinity Mode

The affinity mode of the CA port is displayed.

If the affinity mode is neither "ON" nor "OFF", the field is blank.

Function Button

Item Description

[Browse...]

Displays a selection screen for a "Host Group", a "Host", a "CA Port Group", a "CA port", or a "LUN Group".

[Edit]

Edits the path between a host and a CA port.

Operating Procedures

When Selecting a Host Affinity for "Host Group - CA Port Group"

In this screen, change the host affinity settings.

  1. Select the host affinity to be set, and click [Modify Host Affinity] in [Action].

  2. Check the display contents of the host groups.

    The next step that needs to be performed depends on the display contents.

    • When "All (host response name)" is displayed for the host group

      1. Click the [Browse...] button.

        → The [Select Host Group] screen appears. Proceed to Step 3.

    • When the host group is not "All (host response name)"

      → Proceed to Step 4.

  3. Select the host response that is to be assigned to any host, and click the [OK] button.

    → The display returns to the initial screen.

  4. Click the [Browse...] button for the CA port group.

    → The [Select CA Port Group] screen appears.

  5. Select a CA port group to configure a host affinity, and click the [OK] button.

    → The display returns to the initial screen.

  6. Click the [Browse...] button for the LUN group.

    → The [Select LUN Group] screen appears.

  7. Select a LUN group to configure a host affinity, and click the [OK] button.

    → The display returns to the initial screen.

  8. To edit the path between a host and a CA port, click the [Edit] button for the path to be edited.

    → The [Select CA Port] screen appears.

  9. Select whether to enable or disable the path between a host and a CA port, and click the [OK] button.

    To enable the path between a host and a CA port, select the checkbox of the CA port.

    To disable the path between a host and a CA port, clear the checkbox of the CA port.

  10. Confirm the modified host affinity setting and the path between the host and the CA port, click the [Modify] button.

    → A confirmation screen appears.

    Caution
    • An error screen appears in the following conditions:

      • The host interface of the host group and the CA type of the CA port group do not match

      • The number of hosts exceeds the maximum number per CA port

      • Some LUNs cannot be referenced from the host

  11. Click the [OK] button.

    → The modification of the host affinity starts.

  12. Click the [Done] button to return to the [Connectivity] screen.

When Selecting a Host Affinity for "Host - CA Port"

In this screen, change the host affinity settings.

  1. Select the host affinity to be set, and click [Modify Host Affinity] in [Action].

  2. Check the display contents of the hosts.

    The next step that needs to be performed depends on the display contents.

    • When "All (host response name)" is displayed for the host

      1. Click the [Browse...] button.

        → The [Select Host] screen appears. Proceed to Step 3.

    • When the host is not "All (host response name)"

      → Proceed to Step 4.

  3. Select the host response that is to be assigned to any host, and click the [OK] button.

    → The display returns to the initial screen.

  4. Click the [Browse...] button for the CA port.

    → The [Select CA Port] screen appears.

  5. Select a CA port to configure a host affinity, and click the [OK] button.

    → The display returns to the initial screen.

  6. Click the [Browse...] button for the LUN group.

    → The [Select LUN Group] screen appears.

  7. Select a LUN group to configure a host affinity, and click the [OK] button.

    → The display returns to the initial screen.

  8. After confirming the host affinity settings, click the [Modify] button.

    → A confirmation screen appears.

    Caution
    • An error screen appears in the following conditions:

      • The host interface type of the host group and the CA type of the CA port group do not match

      • The number of hosts exceeds the maximum number per CA port

      • Some LUNs cannot be referenced from the host

  9. Click the [OK] button.

    → The modification of the host affinity starts.

  10. Click the [Done] button to return to the [Connectivity] screen.