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RAID Technologies guard against the disk failure. Justify the statement.

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December 13, 2012 3:04:37 AM

What is the failure that RAID technology guards against?
December 13, 2012 3:27:30 AM

It guards against Disk failure

E.g 2x HDD in Raid 1 Mirror
One HDD dies, your data is still available on the other driver compared to have data on one HDD and it dieing and you lose it all.
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a b G Storage
December 13, 2012 3:35:01 AM

It does not guard against disk failure. A raid set up will not bring a failed drive back to life. Depending on the type of raid configuration used it may provide a "mirror" of the data set of the main drive. In the event of data corruption, the main drive data set can be "rebuilt" using the "mirror" data set. The advantage over the normal back up images is that it is up to date to the time the main set got corrupted. If a main drive fails the new drive can be loaded from the remaining good raid pair. Some raid configurations do nothing to safeguard data but provide a considerable disk speed boost during certain operations. It is also possible to construct a raid array that does both.
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a b G Storage
December 13, 2012 3:44:53 AM

only use raid supported hdds in raid port.because if the hdd does not support raid u insert in raid port the hdd repair quickly reason raid port give more current to get data quickly so not supported raid hdds failed.
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a b G Storage
December 13, 2012 3:47:53 AM

Raid technology is costlier is the disadvantage. faster is advantage.
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a b G Storage
December 13, 2012 3:55:05 AM

RAID (redundant array of independent disks; originally redundant array of inexpensive disks) is a way of storing the same data in different places (thus, redundantly) on multiple hard disks. By placing data on multiple disks, I/O (input/output) operations can overlap in a balanced way, improving performance. Since multiple disks increases the mean time between failures (MTBF), storing data redundantly also increases fault tolerance.

For the different types of RAID's see here:

http://searchstorage.techtarget.com/definition/RAID
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