THE RAID CHART

Redundant Array of Inexpensive Drives (RAID) is a disk array where multiple Hard drives, 1-8, appear as on drive. The redundancy of data is where it is duplicated or encoded in one or more areas. This is done to protect the data just in case one of the hard drives fails. The data then can be retrieved from the other hard drive to reconstruct the data on the new hard drive. RAID's are usually used in a network server.

RAID Level Specifications
0 One hard drive or multiple hard drives using disk striping.*
1 Mirrored data, Identically from on drive to another.
2 Data redundantly spread across multiple hard drives, additional drives detect and correct errors.
3 Disk striping at the bit level, detects drive data for parity checking.
4 Disk striping at the data block level, detects drive data for parity checking.
5 Disk striping across all drives, for both data and parity checking.

* files are split, with each part written to a different drive.

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RAID Level	Specifications
0	One hard drive or multiple hard drives using disk striping.*
1	Mirrored data, Identically from on drive to another.
2	Data redundantly spread across multiple hard drives, additional drives detect and correct errors.
3	Disk striping at the bit level, detects drive data for parity checking.
4	Disk striping at the data block level, detects drive data for parity checking.
5	Disk striping across all drives, for both data and parity checking.