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Chapter 5 Configuration Menu
> 5.2 RAID Management
ETERNUS DX400/DX8000 series ETERNUSmgr User Guide Settings/Maintenance
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Copyright 2010 FUJITSU LIMITED
P2X0-0760-02ENZ0
5 Click the [Menu] button.
→ Returns to the [Menu] screen.
End of procedure
5.2.14 LUN Concatenation
This function concatenates multiple existing and new Logical Volumes in order to create a single
Logical Volume with a larger capacity. A volume that is concatenated with this function is called
an "Open Concatenated Volume".
By using [LUN Concatenation], it is possible to expand the server-usable volume capacity while
the storage system is running (hot mode). If there is sufficient free area in the existing RAID
groups, addition of new disks is not necessarily required to create a concatenated volume.
[LUN Concatenation] is effective in solving capacity shortages.
• New volumes may be concatenated with existing volumes.
If less than 16 volumes are concatenated, extra volumes may be added.
• Concatenated volumes are created from the free areas of RAID groups.
• This function enables concatenation over multiple RAID groups.
It also enables the concatenation of multiple free areas in the same RAID group.
• When concatenating existing volumes, all RAID levels are supported.
Concatenation is possible even if the new and existing volumes use different RAID levels.
• Volumes with a capacity of between 1,024(MB) and 8,388,607(MB) can be concatenated.
• Maximum volume capacity after concatenation is 32(TB).
• Up to 16 volumes can be concatenated.
■ Concatenated Volume Requirements
• Volume type must be [Open].
• Volume [Status] must be [Available] (*1).
• Volume capacity must be at least 1,024(MB).
• For already concatenated volumes:
- Number of volumes must be less than 16.
- Volume capacity must be less than 32(TB).
• RAID Migration may not be running.
• Advanced Copy sessions may not be running.
• Remote Advanced Copy sessions may not be running.
• LDE process may not be running on any parent RAID groups.
• Volume Encryption may not be running.
*1: The [Available] status includes volumes that are being formatted.
In order to recover normal status (the status before failure), the
configuration information of the ETERNUS DX400/DX8000 series
may be needed. After RAID Migration has been completed, use the
[Export Configuration] function to get the configuration information.