Chapter 5 Volume Management
5.2 Functions in the Action Area for Volume
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3 Click the [Done] button to return to the [Volume] screen.
5.2.5 Expand Volume
This function concatenates a new volume to the selected volume by using the LUN Concatena-
tion function to expand the volume capacity that can be used from the server.
Volume expansion provides the following features:
• Volume capacity can be expanded by using the free space in an existing RAID group.
• A volume with a maximum capacity of 128TB can be created.
• Concatenation can be performed among multiple RAID groups.
• Any RAID level can be applied for a concatenation source volume and a concatenation
destination volume. Concatenation can be performed regardless of the RAID level for the
concatenation source volume and the concatenation destination volume.
• Data can be accessed from the host in the same way regardless of the concatenation status
(before, during, or after concatenation).
• When the number of volumes in a concatenated volume is 15 or less, volumes can be added
to the existing concatenated volume.
Requirements for concatenating a volume
• The "Type" is "Standard"
• The "Status" is not "Broken", "Data Lost", "Not Supported", "Not Ready", or "Readying"
• The [Expand Volume] function is not already being performed
• The volume capacity is 1GB or larger
• When the concatenation source volume is a concatenated volume, the volume must satisfy
the following requirements:
- The number of volumes in the concatenated volume must be 15 or less
- The capacity of the concatenated volume must be less than 128TB
• Migration is not being performed (the target volume is not used as a migration source or a
migration destination)
• There are no Advanced Copy sessions (local or remote)
• LDE is not being performed for the RAID group to which the target volume belongs
• Encryption is not being performed for the target volume
Requirements to obtain free space from RAID groups
• The "Status" is not "Broken"
• The RAID group must satisfy the following requirements:
- The RAID group must contain Standard volumes, SDVs, or SDPVs
- The RAID group must not contain volumes
- The RAID group must not belong to a TPP
- The RAID group must not be registered as a REC Disk Buffer
• The number of volumes registered in the target RAID group is 127 or less
• The free space for the RAID group is 1GB or larger
• The RAID group must not be blocked
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