Datasheet

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RAID0 ( Doesn’t check odevity) Ž
- Allow any NDAS setting between 2 —8 to unite a single huge disk driver.
- Which is very useful when a huge capacity setting is need
- Allow no error,, all the data will get lost once one of them is broken.
- When rite into NDAS settings, the method which similar to the Aggregati on can get more fast
features.
raid 0 uses block striping function, divide the data into many equal logical parts an continual ly separate to each
disk. , Ž•.For example, write the data 1 to disk 0, 2 to disk 1, etc. When finish writing the last signal, It will rewrite
the data continually, until all the data are all wrote
Because this method is to write or read out several disks, it’s of fast speed. In fact, data transferring is in order,
But several read (write) can operate at the same time., which means that when write the data one to disk 0. data two has
started, so consequently , several disk can write at the same time.
Although named raid 0, it does not has all the features of raid, that’s because it has no data security function,,
once there is something wrong with one disk , all the data will get lost. Therefore, raid 0 can not apply to critical task.
After block striping, the capacity of whole disk equals to the union of each ide capacity will appear on the CPU. .
( For instance, if we use 2 ide of 20GB WILL make up a disk of 40GB, The united disk will appear on the CPU. )
RAID1
- Allow 2,4,6,8 NDA Settings can mirror at the same time.
- Mistake allowing, if one is broken, can re gain through any other one.
- The mirrored NDAS settings can be make up. raid 1, the disk mirroring function •means that it copy the data
from disk one to disk two, or equivalent storage device to realize the data redundancy. It’s disadvantage it
cost much more than a single disk of no redundancy furthermore, the writing speed is not improved. For
example, when write data 1 to disk 0, it’s copy start to write into disk 1, that because the same data is wrote to
two disks. But it can improve read speed when read data from the disk, is because it separates the read request
to two disks.
Since the data of one disk has totally copied to another one, it can protect the data when the disk is damaged.
If the data of one disk gets wrong, or the disk run off circuit, now, the other disk will save the data loss and system
cut-off , which caused by the disk mirror.
After disk mirror•the whole capacity of the disk equals half of the union of each ide. (Foe example, if we use this
function to unite 4 ide of 1gb, and the capacity of the new united disk is 2gb. Which will appear on the computer
as one disk•