User Manual

Figure 4. X-RAID disk usage

1. The first disk that you install is used for initial (unprotected) storage space.

2. The second disk that you install is reserved for data protection (parity information).

3. Installing additional disks increases your storage space.

For systems with six or fewer bays, X-RAID reserves the capacity of one disk for data

protection. For systems with more than six bays, with at least two disks and up to five

disks, X-RAID reserves the capacity of one disk for data protection. For systems with

six or more disks, the default format is RAID 6, which reserves two disks. The actual

space reserved for data protection is distributed across all disks.

Note

Flex-RAID

NETGEAR’s Flex-RAID technology allows you to choose from among several industry-standard RAID levels:

• JBOD.This most basic RAID level does not protect your data from loss if one of your drives fails. JBOD

is available only on volumes consisting of a single hard disk.

• RAID 0. RAID 0 distributes data across multiple disks, resulting in improved disk performance compared

to systems that do not use RAID formatting.The total capacity of your storage system equals the capacity

of the smallest of your disk drives times the number of disks. RAID 0 is available on volumes consisting

of two or more hard disks.

• RAID 1.This RAID level provides full redundancy of your data, because it duplicates data across multiple

disks. Exactly the same data is stored on two or more disks at all times. RAID 1 protects your data from

loss if one disk fails.The total capacity of your storage system equals the capacity of your smallest disk.

Volume Configuration

ReadyNAS OS 6.9.3