Any form of data storage employed to store and maintain data is not 100% reliable and save from failure. No data storage hardware is perfect and sooner or later it will fail. In that case, all the vital information and data will be sacrificed and access to the all-important data, documents and files will become impossible until and unless, it is recovered through an online software for data recovery or professional help is requested in case of a more severe damage. If you use RAID, redundant array of independent disks, then it means that you will be storing your data in multiple locations and many data dependent organizations and business can profit from this scheme of data storage as it provides a backup along with reliability and better performance.
How does RAID help in data recovery?
As explained earlier, RAID is the redundant storage of data on multiple hard drives acting as one. Multiple hard drives are combined together and instead of function as individual components they act as one single unit. How does RAID help or aid in data recovery is a very frequently asked question. Following techniques are employed by RAID, to help in data recovery:
- To understand this methodology let us consider an example where a set of data is stored on disk 1 and another set is stored on disk 2. Some sort of parity is generated and stored on disk 3. This parity can be generated by performing any logical operation on the data of disk 1 and 2. For instance, we can add data of disk1 and disk2 and save the result on disk 3. In case anyone disk goes down or crashes, its data can be recovered by subtracting the contents of disk 2 from the parity. By this course of action, lost data can be recovered and significant loss can be avoided.
- As the name suggest, RAID performs mirroring of the data. The data stored on the main hard drive is mirrored on another identical device. Doing so, makes an exact same copy of the data and if the main drive fails; data can be fetched from the device it was mirrored on. Although creating a mirror makes the data writing process a little more time consuming but fetching data becomes faster and redundancy obviously makes it reliable and safe.
- This method is not exactly a data recovery option as it does not create a mirror copy or a redundant file; rather it splits up the stored data into different components and stores them on different disks. Doing so increases the access speeds significantly because when needed, data can be fetched from different disks at the same time hence resulting in quicker access. But this methodology can be used with other techniques to create and maintain data backup.
Different levels or types of RAID exist. Originally only 5 levels of RAID existed namely, RAID1, 2, 3, 4 and 5. Many more hybrid versions have been developed but they are the modified versions of the original RAID levels. What differentiates these levels from each other are the techniques and strategy used to replicate data and data storage.
RAID 0 uses data stripping and provides no redundancy, RAID 1 uses mirroring and provides data backup along with faster access speeds, RAID 2 are no longer used but it also employed data stripping with no backup, RAID 3 is also used very less, it stores parity data, provides back up but is effective only in cases where data is fetched after long intervals. RAID 4 also stores parity data and provides backup along with faster processing speed. RAID 5 uses parity data and provides efficient backup. RAID 6 and 10 also use parity stripping and can recover from a failure.
Irrespective of the type of RAID you are using, you might face data loss and in case a backup was not maintained you can find yourself in hot water. In case of an emergency, always consult professionals available to solve your problem effectively and with expertise. For best possible solutions and answers, a renowned service provider is Data Recovery Chicago – providing reliable service at affordable rates since decades.
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