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"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
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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
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