Netgear ReadyNAS 104 User Manual

For more information about how to add a disk to your system, see the hardware manual 
for your system, which is available at 

You must use supported disks in your ReadyNAS system. For a list 
of supported disks, visit 

Wait for the volume to resync your data.

You can continue to use your ReadyNAS system while the volume is resyncing. 
Resyncing can take several hours. The start and completion of the resyncing process is 
recorded in the system log (see 

219). 

If you set up email notifications for your system, you receive an email message when the 
process finishes. For more information about alert notifications, see 

disk.

This section discusses protection against disk failure. The types of protection available 
depend on the number of hard disks installed in the ReadyNAS system.

X-RAID2 requires a minimum of two hard disks to provide protection against disk failure. If 
you have a one-disk ReadyNAS storage system and want protection from disk failure, 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 

An X-RAID2 volume that includes two or more disks is automatically formatted to protect 

against the failure of one disk. If you want to protect your data against the failure of two disks, 
you must switch to Flex-RAID and select RAID 6. To use RAID 6, you must install four or 
more disks. For more information about how to switch to Flex-RAID, see 

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.