There are actually various typical RAID levels from RAID 0 to RAID 6.
RAID 0: stripes the information across a set of drives but for those who shed a drive you lose all the things RAID 1: mirrors the data to a different disk typically in mirrored pairs of two RAID three: stripes the data and includes a drive just for parity RAID 5: distributes information and parity across the drives in case you shed one particular RAID six: distributes information and doubles the parity enabling for any two drive failure One of the most frequently utilized configuration is RAID 5. As a way to recognize what RAID is you might want to recognize how the tough drives operate inside your computer system or externally in an enclosure. So that you can have a RAID configuration you will need a minimum of 3 tough disks. For our purposes we are going to be working with five challenging drives in our configuration. The laptop must have a RAID controller inside the laptop or computer on the motherboard in order to connect the challenging drives. The other option should be to have an external RAID enclosure to hold the tough disks. With five disks within the configuration every single block of data is being written and spread across those 5 drives writing a marker (parity bit) in case there's a loss of one particular of those drives. In the occasion of a drive failure the remaining 4 drives carry the load working with the parity bit so it is not noticed by the end user of the laptop or computer. The parity bit keeps track of errors as each block of information is written towards the hard drives. Within the case with the loss of a second drive that would be catastrophic even to get a RAID five configuration to manage. Commonly RAID devices have LEDs around the drive enclosures that glow red in case of drive failure. The RAID unit manufacturer ought to give alerting software program that will operate together with your operating program plus the method log to notify you of a failure also. When the failed drive is replaced the RAID unit will rebuild the data on the new drive re-establishing the RAID 5 set just like new. Recovery from the drive failure as well as the subsequent rebuild procedure may take many hours and will degrade the efficiency of the computer system until completed. Raid on motherboard is readily available from several producers. Even though not common in desktop PCs there are solutions permitting you to set up external RAID enclosure with minimal work. Discover more info linux raid recovery
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