Chapter 3 Volume Management
3.5 Expand Volume
ETERNUS Web GUI User’s Guide (Settings)
Copyright 2015 FUJITSU LIMITED P2X0-1270-13ENZ0
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3.5 Expand Volume
This function concatenates a new volume to the selected volume by using the LUN Concatenation 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.
• Free space that is 1GB or more can be concatenated.
• A volume with a maximum capacity of 128TB can be created (the maximum capacity of an ODX Buffer
volume is 1TB)
• 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 Ready", or " Readying"
• 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
(If the concatenated volume is configured with an ODX Buffer volume, the volume must be less than
1TB)
• RAID 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) for which the copy range is "Totally" (*1)
• LDE is not being performed for the RAID group to which the target volume belongs
• Encryption is not being performed for the target volume
• A Storage Migration path is not created in the target volume
• "Cache Page Capacity" must not be limited (*2)
• Volumes are not used for the Storage Cluster function
• Data protection by "T10-DIF (Data Integrity Field)" is not enabled
*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 ETERNUS Web GUI or ETERNUS CLI
*2: A "-" (hyphen) is specified for "Cache Page Capacity" by using the procedure in "3.14 Modify Cache Parameters"
(page 316). Note that "-" (hyphen) is the default value.
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