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Chapter 5 Volume Management
5.2 Functions in the Action Area for Volume
5.2.1
Create Volume
This function creates new volumes in the existing RAID group or Thin Provisioning Pool (TPP).
Standard volumes, 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, 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 formatting.
•
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.
•
When encryption mode is disabled, volumes encrypted by CM 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
•
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
•
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) +
0.1% of the copy source volume capacity is automatically secured in the
ETERNUS DX Disk storage system. "24MB" is the smallest volume
capacity. 0.1% of the copy source volume 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 TPVs 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 sys-
tem
-
When volumes undergoing RAID migration exist
-
When volumes undergoing Balancing TPV exist
71
ETERNUS Web GUI User's Guide
Copyright 2011 FUJITSU LIMITED
P2X0-1090-02ENZ0
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