NETGEAR RNDU4000-100NAS Software Manual page 30

If you do not select a format within 10 minutes, your system reboots in the same mode
that it was previously using.
4. Select the Flexible Volume (Flex-RAID) radio button.
5. Select a RAID level from the Select the desired RAID level drop-down menu.
If you select Auto, your ReadyNAS system automatically chooses a RAID level based on
the number of disks that are installed in your system, as follows:
Number of installed disks
1
2
3
4
5
6
6. Click the Next button.
You are prompted to confirm the volume creation command.
7. Click the OK button.
The volume is formatted. This can take quite a while, depending on the size of your hard
disk drives.
8. (Optional) Restore your any backed-up data to the reformatted disks.
For more information, see
ReadyNAS for Home RAIDiator 4.2
RAID level automatically chosen
RAID 1
RAID 5
RAID 6
Recover Data to Your ReadyNAS System
Disk Configuration
30
on page 134.