Add LUN Group

Overview

This function creates a new LUN group, and allocates a volume number in the storage system to the Logical Unit Number (host LUN), which can be referenced by the host.

The following list shows the maximum number of LUN groups that can be created for each model.

  • ETERNUS DX60 S5: 128

  • ETERNUS DX100 S5/DX200 S5: 1024

  • ETERNUS DX500 S5/DX600 S5: 2048

  • ETERNUS DX8100 S4: 1024

  • ETERNUS DX900 S5 or ETERNUS DX8900 S4: 6144

  • ETERNUS AF150 S3/AF250 S3: 1024

  • ETERNUS AF650 S3: 2048

Caution

  • Only the volumes with "Standard", "WSV", "TPV", "FTV", or "SDV" volume types can be registered in the LUN group.

  • Normally a LUN group cannot be created without registering volumes. However, it can be created if it is used for Veeam Storage Integration.

  • Up to 4096 LUNs can be created. If the host affinity setting is performed for the host groups or hosts to which the host response setting has been allocated, the number of LUNs that can be referenced by the host vary depending on the host response setting. Refer to "Host Response and Referable Number of LUNs" for details.

  • Note that if a LUN group to which volumes are mapped from LUN#512 onward exists, the maximum number of LUN groups cannot be created. This is because when volumes are mapped for LUN#512 onward, an additional LUN group is created as an internal resource for every 512 LUNs. For example, when volumes are mapped in LUN#0 and LUN#1024, three LUN groups are created (one for LUNs #0 to #511, one for LUNs #512 to #1023, and one for LUNs #1024 to #1535) even though no volumes are mapped between LUN#1 and LUN#1023.

  • The following volumes cannot be registered in the LUN group. These volumes are not displayed as selectable volumes.

    • "SDPV" type volumes

    • Volumes with the mirroring reservation attribute (*1)

    • ODX Buffer volumes

    • NAS volumes and NAS system volumes that are used in a Unified Storage environment

    • Volumes that are used for the Storage Cluster function

    • Volumes that are used for the Virtual Volume function (including "$VVOL_META")

    • Data Container Volume

    • Veeam Snapshot Volumes

      However, if the LUN group is used for Veeam Storage Integration, a Veeam Snapshot Volume is displayed as an option and can be registered in the LUN group.

      *1  :  An attribute to be set to a volume being created as the REC copy destination by the Dynamic LUN Mirroring function. The volumes with this attribute may have been left in the storage system due to unsuccessful creation. Volumes that have the mirroring reservation attribute can be checked in the "Forbid Advanced Copy" field on the [Volume] screen. Refer to the [Volume (Basic Information)] function for details.

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.

Settings

LUN Group Setting

In this screen, create a LUN group.

Item Description Setting values

Name

Specify the LUN group name.

An existing LUN group name cannot be specified.

Up to 16 alphanumeric characters,

symbols (except "," (comma) and "?"),

and spaces

Number of LUNs

The number of host LUNs (0 to 4096) to which the volumes are allocated is displayed.

LUN Overlap

If volumes in the LUN group satisfy one or both of the following conditions, "Yes" is displayed. For any other conditions, the field is blank.

  • The volumes are allocated to different LUN groups

  • The volumes are included in the mapping information, which is directly allocated to the port without specifying the host group or the CA port group

Veeam Storage Integration

If the LUN group is used for Veeam Storage Integration, select the "Yes" checkbox.

If the LUN group is not used for Veeam Storage Integration, clear the checkbox.

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

Checkbox

Selected

Cleared (Default)

Define LUN Group

The LUN and volume allocation information in the corresponding LUN group is displayed. Click the [Add] button to display the [Add LUN] Screen.

Item Description

Checkbox to select a volume

Select checkboxes for host LUNs and volume allocation information that are to be deleted from the LUN group.

Host LUN

The host LUN (0 to 4095) is displayed.

Volume No.

The volume number allocated to the host LUN is displayed.

Name

The volume name allocated to the host LUN is displayed.

Type

The volume type allocated to the host LUN is displayed.

Standard

WSV

TPV

FTV

SDV

Capacity

The volume capacity allocated to the host LUN is displayed.

When the "Type" is "SDV", the logical capacity, which can be accessed from the host, is displayed.

LUN Group

If the volume is allocated to different LUN groups, the LUN group name is displayed. If the host, ports, and LUNs are allocated without specifying a host group or port group by an application other than Web GUI, the location information of the ports is displayed. When a volume is not allocated to different LUN groups, the field is blank.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

LUN group name

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

Blank

For the other models

LUN group name

CM#y CA#z Port#w

Blank

x: CE number

y: CM number

z: CA number

w: Port number

UID

The volume UID allocated to the host LUN is displayed.

The UID is an identifier (storage system name) to specify a volume from the open system server.

32-digit capital letters and numeric characters (hexadecimal)

Function Button

Button Description

[Add]

Adds the host LUN and volume allocation information to the LUN group.

If the allocation information has exceeded the maximum number, the [Add] button is not available.

[Delete]

Deletes the specified host LUN and the volume allocation information from the LUN group.

If no host LUNs or volume allocation information exists, the [Delete] button cannot be clicked.

[Add LUN] Screen

In this screen, allocate volumes to host LUNs.

LUN Setting

Use the radio button in the "Start Host LUNs" field, to specify the starting volume number, which will be allocated to a host LUN. By clicking the [OK] button, the selected volume numbers are allocated to the number of LUNs to be created, starting from the first LUN.

Item Description Setting values

Start Host LUNs

Specify the host LUN from which volume allocation is to be started.

Caution

  • If the allocation of the host LUN is started from an "External Volume", specify the host LUN that is allocated to the relevant volume in the external storage system. The host LUN for the External Volume is displayed in the [External Drives] screen. Refer to the [External Drives] function for details.

  • For LUN groups whose the "Yes" checkbox of "Veeam Storage Integration" is selected, volumes cannot be allocated to Host LUN#511.

0 - 4095

(decimal)

The smallest number among the available host LUNs (Default)

Number of LUNs

Specify the number of host LUNs to which the volumes are allocated.

1 (Default) - 4096

(decimal)

Select Volume

Item Description

Radio buttons to select a volume

Select the radio button of the volume number that allocation is to be started from.

Note

  • If any volumes that cannot be used for allocation exist within the range specified by the LUN number, these volumes are skipped and the next volume is allocated.

  • Volumes that have already been registered in relevant LUN groups (volumes displayed in the "Define LUN Group" field on the [Add LUN Group] screen) are not displayed.

No.

The volume number is displayed.

Name

The volume name is displayed.

Type

The volume type is displayed.

Standard

WSV

TPV

FTV

SDV

Capacity

The volume capacity is displayed.

When the "Type" is "SDV", the logical capacity, which can be accessed from the host, is displayed.

LUN Group

If the volume is allocated to different LUN groups, the LUN group name is displayed. If the host, ports, and LUNs are allocated without specifying a host group or port group by an application other than Web GUI, the location information of the ports is displayed. When a volume is not allocated to different LUN groups, the field is blank.

For the ETERNUS DX900 S5 or the ETERNUS DX8900 S4

LUN group name

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

Blank

For the other models

LUN group name

CM#y CA#z Port#w

Blank

x: CE number

y: CM number

z: CA number

w: Port number

UID

The volume UID is displayed.

A "-" (hyphen) is displayed for the Data Container Volume.

32-digit capital letters and numeric characters (hexadecimal)

Note

  • For External Volumes that inherit the External LU Information, the UID of the External Volumes is displayed. If External Volumes do not inherit the information, the UID that is assigned by the storage system is displayed.

  • If the External LU Information is deleted, the UID that is assigned by the storage system is displayed. Refer to the [Delete External LU Information] function for details.

Operating Procedures

In this screen, create a LUN group.

  1. Click [Add LUN Group] in [Action].

  2. Specify the LUN group name.

  3. Click the [Add] button.

    → The [Add LUN] screen is displayed.

    Note

    • To delete the allocation information between LUNs and volumes from the LUN group, select the checkbox for allocation information to delete and click the [Delete] button.

  4. Specify the LUN and the number of LUNs for volume allocation, select the volume numbers to start the allocation to the corresponding LUNs from, and then click the [OK] button.

    → Returns to the [Add LUN Group] screen.

    Caution
    • An error screen appears in the following conditions:

      • The LUN volume, which is specified in "Start Host LUNs", has already been allocated to a different LUN

      • The necessary number of LUNs, which have been specified in "Number of LUNs", cannot be allocated to the LUN volumes

  5. Repeat Step 3 and Step 4 to set multiple allocation information between the LUNs and the volumes.

  6. Check the LUN and the volume allocation information to be registered in the LUN group, and then click the [Create] button.

    → A confirmation screen appears.

    Caution
    • An error screen appears in the following conditions:

      • The "Name" is not entered

      • The "Name" does not satisfy the input conditions

      • The "Name" overlaps with an existing LUN group name

      • The total number of LUN groups has reached the maximum number of LUN groups for each model

      • The data merge process of a SnapOPC+ session is being performed for the specified volume

  7. Click the [OK] button.

    → Adding LUN group starts.

  8. Click the [Done] button to return to the [LUN Group] screen.