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Volume Configuration
35
ReadyNAS OS 6.1
Table 3.
Number of Disks
per Volume
RAID
Level
Can I add a disk to for data protection?
1 RAID 1 Yes. (Additional disk provides redundancy.)
2 RAID 1 No. (Volume protection is already redundant.)
2 or more RAID 0 No. (RAID 0 does not offer protection.)
3 or more RAID 5 Yes. (Additional disk provides dual redundancy and converts the volume to
RAID 6.)
4 or more
(even number)
RAID 10 No. (Volume protection is already redundant.)
4 or more RAID 6 No. (Volume is already protected with dual redundancy.)
Flex-RAID levels and data protection
Disks added to a Flex-RAID volume can be used only for protection. They cannot be used for
storage (horizontal expansion). If you want to add a disk for increased storage capacity, you
must do one of the following:
• Create a volume using the added disks (see Create and Encrypt a Volume on page 29).
• Change the RAID level (see Change to a Different Flex-RAID Level on page 25).
• Switch to X-RAID2 (see Change from Flex-RAID to X-RAID2 on page 24).
To add a protection to a Flex-RAID volume:
1. Add a disk to your ReadyNAS storage system.
For more information about how to add a disk to your system, see the hardware manual
for your system, which is available at
http://support.netgear.com/product/ReadyNAS-OS6.
2. Select System > V
olumes.
The new disk is displayed in the enclosure graphic and is colored black.
3. Select the new disk from the enclosure graphic.