You will find many standard RAID levels from RAID 0 to RAID 6.
RAID 0: stripes the information across a set of drives but if you shed a drive you lose every thing RAID 1: mirrors the information to yet another disk generally in mirrored pairs of two RAID 3: stripes the information and includes a drive just for parity RAID five: distributes information and parity across the drives in case you lose 1 RAID six: distributes information and doubles the parity enabling for a two drive failure One of the most usually made use of configuration is RAID five. To be able to understand what RAID is you must comprehend how the difficult drives perform inside your personal computer or externally in an enclosure. In order to have a RAID configuration you'll need a minimum of 3 challenging disks. For our purposes we'll be employing five tough drives in our configuration. The computer system must have a RAID controller inside the computer around the motherboard in an effort to connect the hard drives. The other selection is always to have an external RAID enclosure to hold the hard disks. With 5 disks in the configuration each block of data is becoming written and spread across those five drives writing a marker (parity bit) in case there's a loss of a single of those drives. In the event of a drive failure the remaining 4 drives carry the load employing the parity bit so it is not noticed by the end user from the laptop. The parity bit keeps track of errors as every single block of data is written to the hard drives. Inside the case in the loss of a second drive that would be catastrophic even for any RAID five configuration to handle. Typically RAID devices have LEDs on the drive enclosures that glow red in case of drive failure. The RAID unit manufacturer must deliver alerting computer software that can operate with your operating program as well as the system log to notify you of a failure also. Once the failed drive is replaced the RAID unit will rebuild the data on the new drive re-establishing the RAID five set just like new. Recovery from the drive failure along with the subsequent rebuild process may perhaps take many hours and will degrade the performance of the laptop or computer till completed. Raid on motherboard is out there from some companies. Whilst not common in desktop PCs there are actually possibilities allowing you to install external RAID enclosure with minimal effort. Learn far more info raid 10
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