QNAP VS-8124U-RP PRO+ User Manual download pdf (Page 210)

210

member hard drives.

RAID 1 Mirroring Disk Volume

RAID 1 duplicates the data

between two hard drives to

provide disk mirroring. To create

a RAID 1 array, a minimum of 2

hard drives are required.

The storage capacity of a RAID 1

disk volume is equal to the size

of the smallest hard drive.

RAID 5 Disk Volume

The data are striped across all

the hard drives in a RAID 5 array.

The parity information is

distributed and stored across

each hard drive. If a member

hard drive fails, the array enters

degraded mode. After installing a

new hard drive to replace the

failed one, the data can be

rebuilt from other member

drives that contain the parity

information.

To create a RAID 5 disk volume, a

minimum of 3 hard drives are

required.

The storage capacity of a RAID 5

array is equal to (N-1) * (size of

smallest hard drive). N is the

number of hard drives in the

array.

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