Raid - EverFocus Paragon960 User Manual

6.5.3

RAID

T he RAID function (Redundant Arrays of Independent Disks) can enable multiple hard disks to
act as one, and the data will be spread out over the disks in one of several ways which are
called "RAID levels". The NVR only supports RAID 5, which can increase disk read and write
speed, offer fault tolerance and provide efficient use of storage space.
Note:
1. To establish a RAID 5 volume, a minimum of three HDDs are required.
2. It's highly recommended to use enterprise level and anti-rotational vibration HDDs with the
same Brand, Model and Capacity.
3. Hot swapping function is not supported. Removing the HDDs without powering off the NVR
will reboot the NVR automatically.
RAID Type:
Off: No RAID.
RAID 5: It takes at least three HDDs to build up a RAID 5, and only one of the HDDs will be used
for recovering data while the rest of the HDDs will be used for data storage purpose. Hence,
the RAID 5 array will not be destroyed by a single drive failure because the system can recover
the data on the remaining disks. However, if more than one disk fail, the data will be missed
and cannot be recovered.
Figure 6-26
RAID 5
A1 A2
B1 B2
C1 C
p
D D1
p
95
PARAGON960 x4 32CH
A3 A
p
B B3
p
C2 C3
D2 D3