RAID 10: Very High Reliability combined with High Performance
Characteristics/Advantages
1. RAID 10 is implemented as a striped array whose segments are RAID 1 arrays
2. RAID 10 has the same fault tolerance as RAID level 1
3. RAID 10 has the same overhead for fault-tolera...
RAID 7: Optimized Asynchrony for High I/O Rates as well as High Data Transfer Rates
Architectural Features:
1. All I/O transfers are asynchronous, independently controlled and cached including host interface transfers
2. All reads and write are centrally cached via the high spe...
RAID 6: Independent Data disks with two independent distributed parity schemes
Characteristics/Advantages
1. RAID 6 is essentially an extension of RAID level 5 which allows for additional fault tolerance by using a second independent distributed parity scheme (two-dimensional parity)...
RAID 5: Independent Data disks with distributed parity blocks
Characteristics/Advantages
1. Highest Read data transaction rate
2. Medium Write data transaction rate
3. Low ratio of ECC (Parity) disks to data disks means high efficiency
4. Good aggregate transfer rat...
RAID 4: Independent Data disks with shared Parity disk
Characteristics/Advantages
1. Very high Read data transaction rate
2. Low ratio of ECC (Parity) disks to data disks means high efficiency
3. High aggregate Read transfer rate
Disadvantages
1. Quite complex...
RAID 3: Parallel transfer with parity
Characteristics/Advantages
1. Very high Read data transfer rate
2. Very high Write data transfer rate
3. Disk failure has an insignificant impact on throughput
4. Low ratio of ECC (Parity) disks to data disks means high efficien...
RAID 2: Hamming Code ECC
Characteristics/Advantages
1. “On the fly” data error correction
2. Extremely high data transfer rates possible
3. The higher the data transfer rate required, the better the ratio of data disks to ECC disks
4. Relatively simple c...
RAID1: Mirroring and Duplexing
Characteristics/Advantages
1. One Write or two Reads possible per mirrored pair
2. Twice the Read transaction rate of single disks, same Write transaction rate as single disks
3. 100% redundancy of data means no rebuild is necessary in case ...
RAID 0: Striped Disk Array without Fault Tolerance
Characteristics/Advantages
1. RAID 0 implements a striped disk array, the data is broken down into blocks and each block is written to a separate disk drive
2. I/O performance is greatly improved by spreading the I/O load acros...
