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Whitepaper: ReadyNAS FlexRAID Volume Optimization Guide

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Whitepaper:
Optimizing Your ReadyNAS® OS Flex-RAID Volumes
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In the next step, optionally select whether you want to set quotas and/or encrypt your volume. If there is no requirement to use
quotas with this volume, leave it unchecked as enabling quotas may impact performance. Finally, click Create.
11.4. Adding Parity
Adding Parity allows you to increase the redundancy of your volume. For example, adding parity to a RAID 5 volume with one-
disk failure tolerance would convert it to a RAID 6 volume with two-disk failure tolerance.
11.5. Expanding an Existing Volume
Expanding a volume means you add drives to the existing RAID or RAID groups. This adds to the capacity of your volume but
will not change its RAID characteristics. If your volume has more than one RAID group, you’ll need to add at least 1 drive per
RAID group. The following table summarizes the possible changes.
Volume Operations Table
Volume Operation Available? Resulting RAID Level Notes
JBOD
Add Parity Yes RAID 1
Expand No n/a
Add Group Yes JBOD
0
Add Parity Yes RAID 5
Expand No n/a
Add Group Concatenated RAID 0 Concatenated
1
Add Parity No n/a
Expand Yes RAID 5
Add Group Concatenated
RAID 1 Concatenated or
RAID 5 Concatenated