Planet NAS-5400 User Manual page 80

Select this option to make the selected disks as a concatenated, single volume.
RAID 0
A RAID 0 volume takes all hard disk for one large hard disk, and performs parallel and
multiple read and write, thus it has better performance than Non-RAID volume. RAID 0
volume is applicable for severs with two hard disks, and the hard disks must be identical in
size. If 2 different capacity hard disks are chosen to create a RAID 0 volume, the capacity
of the smaller one will be adopted to create the volume.
RAID 1
A RAID 1 volume duplicates data from one hard disk to another to ensure data security
and integrity. The actual available space is only half of the total space. This level of RAID
ensures high level of data security, but because it only has 50% utilization rate, the cost is
relatively higher than other volume types. RAID 1 volume is applicable for severs with two
hard disks, and the hard disks must be identical in size. If 2 different capacity hard disks
are chosen to create a RAID 1 volume, the capacity of the smaller one will be adopted to
create the volume.
RAID 5
This configuration includes a backup option. It treats multiple disks as one virtual disk to
increase access speed. It uses parity mode to store redundant data on a space equal to
the size of one disk for later data recovery. The actual available storage space in a system
with n disks is thus n-1 hard disks.
RAID 5 with Spare
RAID 5 with Spare adds one spare disk to the RAID 5 array, allocating one for redundancy
and the second one as a spare. The actual available storage space in a system with n
disks is thus n-2 hard disks.
2. If you choose to create a RAID 1, RAID 5, or RAID 5 with Spare volume, you must specify
which option you want the consistency or parity data of the volume to be created. The volume will
be available for access in a short time when consistency or parity is built in the background. If the
consistency of parity is built in the foreground, all processes must be finished before the volume
can be accessed.
3. The "Available Space (GB):" list indicates space in each hard disk that has not yet been
allocated. Please determine which hard disk storage space will make up the volume.
4. Select the size from the "Size to use:" pull down menu.
5. Click the "Add>>" button.
6. Repeat step 4 to step 6, or press "Ctrl" fro multiple selections or "Shift" for continuous selections
in step 4.
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