Horizontal expansion is available for X-RAID2 volumes only.
To horizontally expand an X-RAID2 volume:
Add a disk to an X-RAID2 volume that includes two or more disks.
For more information about how to add a disk to your ReadyNAS system, see the hardware manual for your system, which is available at https://support.netgear.com/product/ReadyNAS-OS6.
The system automatically determines whether the new disk is used for protection or storage. When you add a second disk, the new disk is used for data protection. When you add a third or fourth disk, the new disk is used to increase your storage capacity. New disks are incorporated in the background while you continue to use your storage system. New disks are incorporated in the background while you continue to use your storage system. For more information about X-RAID 2, see the What is X-RAID 2 and how does it work with my ReadyNAS OS 6 storage system? support article.
This article applies to the following ReadyNAS and EDA storage system models:
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ReadyNAS 102
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ReadyNAS 104
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ReadyNAS 312
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ReadyNAS 314
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ReadyNAS 316
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ReadyNAS 516
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ReadyNAS 2120
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ReadyNAS 3220
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ReadyNAS 4220
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EDA 500