You'll find a variety of typical RAID levels from RAID 0 to RAID 6.
RAID 0: stripes the data across a set of drives but should you shed a drive you drop everything RAID 1: mirrors the information to a further disk ordinarily in mirrored pairs of two RAID 3: stripes the data and has a drive just for parity RAID 5: distributes information and parity across the drives in case you lose one particular RAID six: distributes information and doubles the parity enabling for a two drive failure The most usually used configuration is RAID 5. To be able to fully grasp what RAID is you must comprehend how the hard drives work in your pc or externally in an enclosure. As a way to have a RAID configuration you'll need a minimum of 3 challenging disks. For our purposes we will be utilizing 5 tough drives in our configuration. The laptop should have a RAID controller inside the computer around the motherboard in an effort to connect the challenging drives. The other option would be 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 these 5 drives writing a marker (parity bit) in case there's a loss of one of those drives. Inside the event of a drive failure the remaining four drives carry the load utilizing the parity bit so it is not noticed by the finish user of your pc. The parity bit keeps track of errors as each block of data is written for the tough drives. Inside the case on the loss of a second drive that could be catastrophic even to get a RAID 5 configuration to deal with. Commonly RAID devices have LEDs on the drive enclosures that glow red in case of drive failure. The RAID unit manufacturer need to deliver alerting computer software that may function along with your operating program as well as the program log to notify you of a failure too. As soon as the failed drive is replaced the RAID unit will rebuild the information on the new drive re-establishing the RAID five set just like new. Recovery from the drive failure and also the subsequent rebuild approach might take many hours and can degrade the functionality of your laptop or computer till completed. Raid on motherboard is readily available from several makers. Whilst not common in desktop PCs there are actually selections allowing you to install external RAID enclosure with minimal effort. Discover a lot more info raid 0 1
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