Expand Thin Provisioning Volume

Overview

This function expands the capacity of Thin Provisioning Volumes (TPVs).

Requirements for Expanding a TPV

  • TPVs that are to be expanded must be one of the following volumes:
  • The capacity does not exceed the following maximum values

    • For ODX Buffer volumes, the capacity must not be more than 1 TB

    • For TPVs or Deduplication/Compression Volumes, the capacity must not be more than 128 TB

    • For Data Container Volumes, the capacity must not be more than the maximum capacity (48 PB).

  • Volumes that are not Veeam Snapshot Volumes

  • There are no Advanced Copy sessions for which the copy range is "Totally" (*1)

  • Balancing is not being performed in the target TPV

  • RAID Migration is not being performed in the target TPV

  • A Storage Migration path is not created in the target volume

  • Not used for the Storage Cluster function

  • For the Data Container Volumes, the status of the relevant Data Container Volume is other than "Readying", "Not Available", "Not Ready", "Broken", or "Data Lost"

  • For the Deduplication/Compression Volumes, the status of the Data Container Volume in the TPP to which the Deduplication/Compression Volumes belong is other than "Readying", "Not Available", "Not Ready", "Broken", or "Data Lost"

    *1  :  "Totally" is specified for the copy range in the following conditions:

    • When performing a LUN to LUN copy session with the ETERNUS SF AdvancedCopy Manager Copy Control Module (CCM)

    • When performing a copy session with ETERNUS SF AdvancedCopy Manager Adapter for VMware Site Recovery Manager

    • When performing a copy session with ETERNUS VSS Hardware Provider

    • When performing a SnapOPC+ session that is specified with Web GUI, CLI, or REST
Caution

  • This function cannot be performed when there is no TPV in the storage system.

  • If TPPs with different chunk sizes exist in the storage system, the entire maximum pool capacity that is specified in "Set Thin Provisioning" might not be usable to expand TPVs. Refer to the [Set Thin Provisioning] function for details.

  • The total capacity of TPVs in a TPP must be smaller than the total capacity that can be used to expand the TPP. The value of "total capacity that can be used to expand the TPP" is displayed in the "Total Capacity after expand" field of the [Expand Thin Provisioning Pool] screen. Refer to the [Expand Thin Provisioning Pool] function for details.

  • This function cannot be performed when there is no free space for expansion in the storage system.

  • Expanded TPV capacity must be recognized by the server.

  • If the total logical capacity of the Deduplication/Compression Volumes that are to be created in the same TPP exceeds the capacity of the Data Container Volume, the logical capacity of the Data Container Volume must be expanded.

  • To expand Data Container Volumes, stop or suspend the Advanced Copy session for all the Deduplication/Compression Volumes in the TPP to which the target Data Container Volume belongs.

Note

  • The maximum total capacity of the TPVs that can be created in the storage system depends on the maximum pool capacity specified with the [Set Thin Provisioning] function. To check the maximum pool capacity, use the [Settings (Thin Provisioning)] function. Note that the total logical capacity of TPVs does not include the Deduplication/Compression Volume capacity.

  • The allocation method for the TPV can be checked in the [Volume] screen. Refer to the [Volume (Basic Information)] function for details.

Settings

In this screen, input a TPV capacity after expansion.

Target Thin Provisioning Volume

Item Description

No.

The volume number is displayed.

Name

The volume name is displayed.

For Data Container Volumes:

$DATA_CNTNRx (x: TPP number)

For the other volumes:

Volume name

Type

The volume type is displayed.

TPV (fixed)

Volume Capacity

The current TPV capacity is displayed.

For Data Container Volumes:

32 TB - 48 PB

For ODX Buffer volumes:

1 GB - 1 TB

For the other volumes:

24 MB - 128 TB

Volume Setting

Item Description Setting values

Volume Capacity after expand

Input the TPV capacity after expansion and select the units of capacity.

Up to a 15-digit number including the "." (decimal point) can be input. Note that when "MB" is selected, the specified value is rounded down to the nearest whole number. When "GB" or "TB" is selected, the specified value is converted to "MB" and rounded down to the nearest whole number.

For Data Container Volumes:

33554433 MB - 48 PB

For ODX Buffer volumes:

1025 MB - 1 TB

For the other volumes:

25 MB - 128 TB

Unit: PB/TB/GB/MB

Current TPV capacity < TPV capacity after expansion

Operating Procedures

  1. Select the TPV to be expanded and click [Expand TPV] in [Action].

  2. Input the TPV capacity after expansion, and click the [Expand] button.

    → A confirmation screen appears.

  3. Click the [OK] button.

    → Expansion of a TPV starts.

    Caution

    • When expanding the TPV where the allocation method is "Thick" and the free space in the TPP is insufficient, an error screen appears.

  4. Click the [Done] button to return to the [Volume] screen.

    Caution

    • If the "Provisioned Capacity" (or the total logical capacity) of the volumes that exist within the TPP exceeds the total capacity of the TPP (or if the "Provisioned Rate" (or the capacity rate) exceeds "100 %") after the volume capacity expansion, a warning message appears in the result screen. Check the TPP used state and add drives to expand the TPP capacity as required. Check the [Thin Provisioning Pool Detail] screen for "Provisioned Rate". Refer to the [Thin Provisioning Pool (Basic Information)] function for details.