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Chapter 5 Volume Management
5.2 Functions in the Action Area for Volume
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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5.2.1 Create Volume
This function creates new volumes in the existing RAID group or Thin Provisioning Pool (TPP). Standard
volumes, Wide Striping Volumes (WSV), Thin Provisioning Volumes (TPV), Snap Data Volumes (SDV), and Snap
Data Pool Volumes (SDPV) can be created. Volumes are formatted automatically when they are created.
Standard, WSV, TPV, and SDV can be accessed from the host when host affinity is set after volume creation.
Note that SDPVs can be used after volume creation is complete and formatting is started.
• If a Thin Provisioning license is not registered, TPV cannot be created.
• If an Advanced Copy license is not registered, SDV and SDPV cannot be created. However, when using the
ETERNUS DX80 S2/DX90 S2, a free license is registered by default and SDVs and SDPVs can be created.
• When encryption mode is disabled, volumes encrypted by CM cannot be created. Note that when SEDs
are not installed in the ETERNUS DX Disk storage system, volumes encrypted by SEDs cannot be created.
• The following shows the maximum number of volumes that can be created for each model.
- ETERNUS DX80 S2: 2048
- ETERNUS DX90 S2: 4096
- ETERNUS DX410 S2/DX440 S2: 16384
- ETERNUS DX8100 S2: 16384
- ETERNUS DX8700 S2: 65535
• The following shows the maximum capacity of TPV that can be created for each model.
- ETERNUS DX80 S2/DX90 S2: 128TB
- ETERNUS DX410 S2: 384TB
- ETERNUS DX440 S2: 768TB
- ETERNUS DX8100 S2: 768TB
- ETERNUS DX8700 S2: 1024TB
• The following shows the conditions for creating SDPVs.
- The volume capacity must be 2TB or less
- The volume capacity must be a multiple of SDPE capacity (1GB/2GB/4GB).
• When creating an SDV, the capacity setting is not required. 24 (MB) + "Capacity of source volume (only
SDV)" × 0.1% of the copy source volume capacity is automatically secured in the ETERNUS DX Disk storage
system. "24MB" is the smallest volume capacity. "Capacity of source volume (only SDV)" × 0.1% is the
capacity that is used for the controlling information area in the SDV. When using SnapOPC or SnapOPC+,
make sure to create an SDV and SDPVs. An SDPV is a volume that configures an SDP. The SDP allocates
free space when SDV capacity is insufficient.
• The maximum number of volumes that can be created is reduced in the following conditions:
- When TPPs exist in the ETERNUS DX Disk storage system
- When concatenated volumes exist in the ETERNUS DX Disk storage system
- When REC Disk Buffers exist in the ETERNUS DX Disk storage system
- When volumes undergoing RAID migration exist
- When volumes undergoing balancing TPV exist
- When "Enable" is selected for the Flexible Tier function mode
• The following restrictions apply to WSVs:
- Volume capacity expansion is not available (LUN concatenation cannot be performed)
- RAID group capacity expansion for RAID groups which configure WSVs is not available (LDE cannot be
performed)