User Manual

To vertically expand a Flex-RAID volume:

1. Replace one disk in the volume with a larger-capacity disk.

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

which is available at http://www.netgear.com/support/product/ReadyNAS_OS_6.

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

disks, visit http://www.netgear.com/readynas-hcl.

Note

2. 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 are recorded in the system log (see

System Logs on page 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 System Logs on page 219.

3. Repeat Step 1 on page 37 and Step 2 on page 37 until you replace each disk in the volume with a

larger-capacity disk.

Add Protection to a Volume

You can set up protection against disk failure.The types of protection available depend on the number of

hard disks installed in the ReadyNAS system.

Adding Protection to an X-RAID Volume

X-RAID requires a minimum of two hard disks to provide protection against disk failure.To add protection

from disk failure to a one-disk ReadyNAS storage system, 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

https://www.netgear.com/support/product/ReadyNAS_OS_6.aspx.

An X-RAID volume that includes two or more disks is automatically formatted to protect against the failure

of one disk. Except for very large ReadyNAS systems (for example 12-bay systems), if you want to protect

your data against the failure of two disks, you must switch to Flex-RAID and select RAID 6. (Very large

ReadyNAS systems use RAID 6 by default.) To use RAID 6, you must install four or more disks. For more

information about how to switch to Flex-RAID, see Change from X-RAID to Flex-RAID on page 26.

Adding Protection to a Flex-RAID Volume

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.

Volume Configuration

ReadyNAS OS 6.9.3