Netgear RD5D (ReadyDATA Disk Packs) – ReadyDATA Disk Packs (SATA/NL-SAS/SAS/SSD) Software Guide

Select the RAID level based on the number of disks and protection level that you want to use 
for the volume:

RAID 0

1 or more

None

RAID 1

2 only (more disks are not supported in RAID 1) Supported

RAID 5 

3 or more

Supported for one disk

RAID 6

4 or more

Supported for two disks

RAID 10

4 or more, but an even number

Supported for all disks

RAID 50

6 or more, but an even number

Supported for one disk 
per RAID 5 set

RAID 60

8 or more, but an even number

Supported for two disks 
per RAID 6 set

Although a RAID system can be used to back up data from other 

disks or another array, RAID is not meant to be an alternative or 
substitute for backing up data. Data might become damaged or 
destroyed without harm to the disk or disks on which it is stored. For 
example, part of the data might be overwritten by a system 
malfunction; a file might be damaged or deleted by user error or 
malice, and not noticed for days or weeks; and the entire array is at 
risk of physical damage.

In the most general sense, volumes are data storage devices. Volumes can be either 
physical or logical. In this manual, the term volume refers to a logical volume with a RAID set, 
and the terms hard disk drive, disk, and physical volume refer to a physical storage device. 

The ReadyDATA treats disks and volumes in the following ways:

Each logical volume can correspond to one disk.

A logical volume can be made up of more than one disk.

You cannot divide a single disk among two or more volumes.

Although you can install different types of disks within the ReadyDATA, you can select 

only disks of the same physical performance characteristics to be members of one 
volume. For example, you cannot mix nearline SATA 7,200 rpm disks with SAS 15,000 
rpm disks within one volume.

26), you 

can make the following changes to the volume: