Data recovery RAID: Three different words but bounded together

Data recovery RAID: Three different words but bounded together

Data recovery RAID

RAID (originally redundant array of inexpensive disks, now commonly known as redundant array of independent disks) is a data storing constructive technology which uses multiple physical disk drive components into a single logical unit because of data redundancy, performance improvement, or both. Data recovery refers to retrieval of files from broken files systems whereas the aim of RAID recovery is to find out the lost RAID configuration parameters.

How RAID works

With this technology files can be mirrored on more than one disk in the same array and even if one disk stops working the data will still be protected. Because of the technique called stripping (technique for spreading files over multiple disk drives) RAID can also offer the option of reading or writing to more than one disk at one time to improve performance. Due to this arrangement sequential data is broken into parts and send to various disks in the array in a faster speed. A typical RAID array makes use of various disks that appear to be a single device so it can provide more storage capacity from more than a single disk.

RAID data recovery: a developing venture

Many small to medium businesses all over the world have turned their attention to RAID configured system for storing solutions. The reason for using RAID arrays is its highly fault tolerant level offered and low cost of acquisition and maintenance. But, just by chance a RAID array is not successful mainly because of component malfunction (including hard drives and controller cards) then it leaves the files unusable and in many cases damaged. This form of data recovery is a difficult task also because it has different layouts depending on the makers often because of competition in the market. RAID arrays are configured without in-depth knowledge which leads to data corruption.

Data recovery raid: a lane towards new avenues

RAID standard levels are the followings:

  • RAID 0: includes striping, without mirroring or parity and the capacity of a RAID 0 volume is the total of the capacities of the disks in the set which is the same as with a spanned volume.
  • RAID 1: includes data mirroring without parity or striping and this array continue to operate as long at least one drive is functioning.
  • RAID 2: consists of bit level striping with dedicated hamming code, this level is of historical significance only and is not used by any commercially available systems.
  • RAID 3: includes byte level stripping with dedicated parity and is not commonly used in practice
  • RAID 4: consists of block level striping with dedicated parity and before it was used by NetApp but presently been replaced by proprietary implementation of RAID 4 consists of two parity disks called RAID-DP.
  • RAID 5: comprises of block level striping with distributed parity and it requires at least three disks
  • RAID 6: consists of block level striping with double distributed parity and this makes RAID groups very practical for high availability systems as large capacity drives longer to restore.

RAID TECHNOLOGY A HIGH CAPACITY STORAGE DEVICE

Presently RAID technology is very ubiquitous among enterprise storage devices and is available in many high capacity consumer storage devices. Data recovery raid are the three things which revolves around storage devices and is playing a very important in data storage and protection.

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