Disk Redundancy Research

Disk Redundancy Research BY agrarian RAID ses two or more drives in combination to create a fault-tolerant system that protects against physical hard drive failure and increases hard drive performance (Microsoft, 2011). RAID is used to improve the performance of a computer and the data redundancy can give you an extra layer of security. The following are types of RAID used in the industry today: RAID O – (Striped Set), splits the data evenly across two or more disks (Wired Tree, 2010). The SO “sees” the disks as one hard drive.

RAID 1- (Mirrored Set) creates an exact copy of data on two or more disks (Wired Tree, 2010). If one hard drive fails then you have a back up on the second hard drive. RAID 5- (Striped Set Parity) uses block-level striping with parity (a technique of checking whether data has been lost or written over when it’s moved from one place in storage to another or when transmitted between computers (Rouse, 2005)) data distributed across all disks In the RAID array. If one drive fails, the system will remain functional until a scheduled rive replacement can be installed (Wired Tree, 2010).

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RAID 6- (Striped Set Dual Parity) essentially an extension of RAID 5 that allows for additional fault tolerance by using a second independent distributed parity scheme (dual parity) (Enhance Technology, Inc. , 2012) RAID O allows larger logical disks to be created out of multiple physical disks and to Improve performance through simultaneous access of the disks. RAID 1 could be the most expensive because of the number of physical drives needed to make it work properly. If the client has Important Information, RAID 1 gives them a built in back up to protect against hard drive failure.

As a home computer user, I would use Raid O for the performance boost It gives. I don’t have a lot of “important” data to be backed up because most of my Important Information fits on a USB stick. Software RAID Is less expensive than hardware RAID and takes up a portion of the host controller, which can Impede the performance of the system. Heavy processing can cause some pieces of data to be delayed by a small amount of time. These delays can add up, and negate the benefits of the RAID array to some degree.

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