English
Targa NDAS 500 eSATA
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Advanced
RAID
You can group more than one Targa DataBox to a RAID cluster. When you create a
RAID cluster, all existing data on the hard disk will be lost. Take care therefore to back
up your data if you have any important data on the disk.
RAID stands for "Redundant Array of Independent Disks" and serves to improve data
integrity or access speed. The Targa DataBox NDAS 500 eSATA supports the
following RAID configurations:
RAID 0 (Data Striping)
With this procedure all data in parallel is written in batches to at least two hard disks.
While the first disk is writing, the second disk contains further data from the computer.
The writing speed is doubled. This is how it behaves when reading from the hard disk.
In this way, this process offers the full storage space of all connected hard disks with
the highest access speed. For data backup, this process is not recommended.
RAID 1 (Data Mirroring)
In RAID 1 all data from the first hard disk is mirrored onto the second hard disk. If one
of the hard disks fails, no data is lost as all the data stock is contained on the second
hard disk. Owing to the double writing work, this process is slower than using a single
hard disk and the total storage space is only equivalent to one single DataBox NDAS
500 eSATA. The advantage of this process is the high level of data security.
Spanning
Spanning groups two or more DataBoxes one with another to create a very big
partition. This process offers however neither higher speed nor higher data security.
Summary of Contents for External network hard disk
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