What are the different RAID levels and what do they support?
Level 0: Disk Striping – data is transferred in parallel across an array of disks. Redundancy is not provided in this level. Level 1: Disk Mirroring – duplicate contents of one disk are written onto another disk. Level 0+1: Disk Striping and Mirroring – this level combined the performance of striping with the reliability of of mirroring. This results in very high I/O performance and high data availability. Level 2: Bit interleaving data across multiple disks with parity information created using a Hamming code. A Hamming code detects errors that occur and determine which part is in error. RAID level 2 specifies 39 disks with 32 disks of user storage and 7 disks of error recovery coding. Level 3: Data is striped across multiple drives and parity is written to a dedicated drive. Level 3 is typically implemented at the BYTE level. Level 4: Data is striped across multiple drives and parity is written to a dedicated drive. Level 4 is typically implemented at the BLOCK level.
Level 0: Disk Striping – data is transferred in parallel across an array of disks. Redundancy is not provided in this level. Level 1: Disk Mirroring – duplicate contents of one disk are written onto another disk. Level 0+1: Disk Striping and Mirroring – this level combined the performance of striping with the reliability of of mirroring. This results in very high I/O performance and high data availability. Level 2: Bit interleaving data across multiple disks with parity information created using a Hamming code. A Hamming code detects errors that occur and determine which part is in error. RAID level 2 specifies 39 disks with 32 disks of user storage and 7 disks of error recovery coding. Level 3: Data is striped across multiple drives and parity is written to a dedicated drive. Level 3 is typically implemented at the BYTE level. Level 4: Data is striped across multiple drives and parity is written to a dedicated drive. Level 4 is typically implemented at the BLOCK level. Level 5: Error
