Characteristics and Advantages
- "On the fly" data error correction
- Extremely high data transfer rates possible
- The higher the data transfer rate required, the better the ratio of data disks to ECC disks
- Relatively simple controller design compared to RAID levels 3,4 & 5
Disadvantagese
- Very high ratio of ECC disks to data disks with smaller word sizes - inefficient
- Entry level cost very high - requires very high transfer rate requirement to justify
- Transaction rate is equal to that of a single disk at best (with spindle synchronization)
- No commercial implementations exist / not commercially viable
