Now known as Redundant Array of Independent Disks.
RAID 0:
This version used the striping technique to improve performance by distribute read and write operations across multiple drives. This version uses neither parity nor mirroring. This has no error detection system which means if one drive fails all of them fail.
This could be used for larger files.
This could be used for larger files.
RAID 1:
This version uses mirroring (NO striping nor parity).Data is written identically so that when searching for data the driver with the least seek/rotational latency is used.
Lots of cheap drives could use this. or offsite use.
Lots of cheap drives could use this. or offsite use.
RAID 3:
This version uses byte level striping as well as dedicated parity. All disk spindle rotation is synchronized and data is striped so that each byte is stored on a different drive.
RAID 4:
This version uses block level striping with dedicated parity.
Why do we use RAID?
- To improve performance.
- Errors can be detected.(Assuming a version more recent than RAID 0 is being used)
- The computer can continue to function as long as one drive still runs.
You have done a good job at telling me what RAOD is and the different types of RAID. What you haven't done is tell what how a user could use RAID at home. What about in a NAS drive? What are the pro's and con's? You need to make sure that you record your work properly and write what is required.
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