Netgear ReadyNAS 4220 User Manual

Use only supported SATA hard disk drives (HDDs) or solid-state drives (SSDs) in your 
ReadyNAS storage system. If you use disks that are not supported, NETGEAR technical 
support will not provide assistance. For a list of supported disks, see the NETGEAR 
Hardware Compatibility List at 

This section describes how to use previously formatted disks with your ReadyNAS OS 6 
storage system.

Previously formatted disks must appear on the NETGEAR Hardware Compatibility List, 
which is available at 

If you want to use disks that were previously formatted for an operating system other than 
ReadyNAS OS 6 (for example, Windows or RAIDiator), you must reformat the disks.

If you try to use previously formatted disks in a system that does not 
contain any other disks, the system does not boot and 
ReadyCLOUD does not discover your device. If you use RAIDar to 
discover your device, RAIDar displays a “Corrupt Root” error 
message.  
 
If you try to use previously formatted disks in a system that already 
contains usable disks, the system does not reformat or use the 
previously formatted disks. Any data on the previously formatted 
disks remains intact.

The following instructions describe how to reformat previously formatted disks in a 
ReadyNAS OS 6 system. This procedure assumes that the system does not contain any 
other disks.

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Gracefully shut down the storage system.

For information about how to gracefully shut down your system, see the Preferred 
Shutdown section of the chapter that describes your system.

Install the disk.