Easy Volume Expansion - NETGEAR RNDP6620-100NAS - ReadyNAS Pro RNDP6620 Business Edition Software Manual

ReadyNAS for Business RAIDiator 4.2.17
Once synchronization completes, the data volume is redundant. This means that if one disk
fails, the other disk contains all the data, so your are protected from a disk failure.
Furthermore, X-RAID2supports multiple parity, which provides protection against two
simultaneous disk failures.
Note: X-RAID2 does not replace backups.

Easy Volume Expansion

X-RAID2 supports both vertical and horizontal expansion.
Horizontal expansion is the process of adding more disks to a ReadyNAS.
Vertical expansion increases the volume capacity when higher capacity disks are installed in
the ReadyNAS. You can take advantage of higher capacity, or more affordable disks to grow
the size of a ReadyNAS volume by replacing a disk with a larger one, adding more disks, or
both, as they become available.
After the initialization process, the ReadyNAS synchronizes the new disk or disks, and
assures data redundancy. This process can take 30 minutes to several hours, and occurs in
the background, so you can continue using the ReadyNAS. Also, the synchronization
process can also traverse system shutdowns. If you need to shut the system down while it is
performing a synchronization, you can do so freely; when you restart the ReadyNAS, it
resumes the synchronization.
Once completed, and there are a minimum of two disks with more capacity in the system,
reboot the ReadyNAS to start the volume expansion, which occurs in the background. When
the process completes, the data stored on the volume remains intact, but the volume capacity
will have expanded to include the capacity of the new disk, less any additional overhead
needed to assure the redundancy of the data on the volume.
You can expand the ReadyNAS volume repeatedly with additional disks and higher capacity
disks, adding to the value of your investment in a ReadyNAS. For more information visit
http://readynas.com/?cat=54.
See Changing between X-RAID2 and Flex-RAID Modes on page 51 for more information.
Understanding RAID
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