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RAID 0 Explained

RAID 0 is one of the most important types of storage option under RAID system. In this it uses a technology called striping. This is a method of storing data on multiple computer storage devices, hardrives and disk partitions. This enhances performance by providing faster read and write facility. This performance can be increased by using similar kind of disks. For the construction of RAID 0 we need minimum two hard drives. Likewise, RAID 0 recovery is also a specific task. The disk array data capacity is equal to the number of drive members times the smallest member capacity.

RAID 0 builds single logical disk out of multiple disks. Total storage capacity would be the sum of each individual disk. Each disk is proportioned into several identical disks. Each disk is called a stripe. In data RAID recovery process RAID 0 controller stores metadata in track 0 of the physical disk. Configuration is stored in this section. If this Meta data gets corrupted or damaged the logical RAID 0 disk will be lost. In this situation the controller will treat the physical drives as individual entity. Since data is distributed over multiple disks hence data would not be accessible.

Once RAID system fails the role of RAID recovery becomes critical. Since RAID data recovery process needs highly skilled professionals this helps an organization to avoid disaster like data loss. We need to perform RAID partition recovery process in such system so that we can retrieve all the data.

To recover a RAID 0 array the following steps must be taken:

  1. We need to determine the order of the physical drives in the array.
  2. Measures the stripe size from the disk.
  3. From all drive we need to take the backup from track 0.
  4. Re-create the RAID 0 array.

It is important to keep in our mind that RAID 0 is not the original RAID levels. Hence this is not redundant. It is for value addition to increase the performance of RAID. This level of RAID system is useful for large read only NFS servers. It is needed in those servers where mounting several disk can take a lot of time.

This is also used where there would be a limitation of using number of drives in some operating system platforms. Usually this kind of storage system is used for gaming purposes. In gaming systems performance should be maximum but we can temporarily ignore the data integrity part. Each drive will be dependent on the other as there would not be any redundancy. For the same reason in case of data RAID recovery we cannot swap the disks.

Several organizations these days use this technology. This should be noted that for the success of RAID 0 data recovery all drives should be accessible. If one fails we must get that up and running so that we can destripe the set in orders to restore the lost data. Thus we can definitely perform a successful RAID recovery.

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