Netgear RN528X Software Manual - Page 37
Add Protection to a Flex-RAID Volume
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ReadyNAS OS 6.7 Adding Protection to an X-RAID Volume X-RAID requires a minimum of two hard disks to provide protection against disk failure. To add protection from disk failure to a one-disk ReadyNAS storage system, you must add a second disk that is at least as large as the first. You can add it while the system is running. For more information about how to add a disk to your system, see the hardware manual for your system, which is available at https://www.netgear.com/support/product/ReadyNAS_OS_6.aspx. An X-RAID volume that includes two or more disks is automatically formatted to protect against the failure of one disk. Except for very large ReadyNAS systems (for example 12-bay systems), if you want to protect your data against the failure of two disks, you must switch to Flex-RAID and select RAID 6. (Very large ReadyNAS systems use RAID 6 by default.) To use RAID 6, you must install four or more disks. For more information about how to switch to Flex-RAID, see Change from X-RAID to Flex-RAID on page 26. Adding Protection to a Flex-RAID Volume In certain cases, you can add a disk to a Flex-RAID volume to increase data protection. The following table indicates whether adding a disk for data protection is possible for each Flex-RAID configuration. Table 3. Flex-RAID levels and data protection Number of Disks per Volume RAID Level Can I add a disk to for data protection? 1 2 2 or more 3 or more 4 or more (even number) 4 or more JBOD RAID 1 RAID 0 RAID 5 RAID 10 RAID 6 Yes. Converts to RAID 1. (Additional disk provides redundancy.) No. (Volume protection is already redundant.) Yes. Converts to RAID 5. Yes. (Additional disk provides dual redundancy and converts the volume to RAID 6.) No. (Volume protection is already redundant.) No. (Volume is already protected with dual redundancy.) Add Protection to a Flex-RAID Volume To add protection to a Flex-RAID volume: 1. Add disks to the ReadyNAS, if necessary. For more information about how to add a disk to your ReadyNAS system, see the hardware manual for your system, which is available at http://www.netgear.com/support/product/ReadyNAS_OS_6. 2. Log in to the local admin page. 3. Select System > Volumes. 4. Select the volume. 5. Select the unallocated disks to add to the volume. Volume Configuration 37