The RAID 6 has one of the highest reliability but this is also not used much widely in the sense of implementations. RAID 6 is much similar to RAID 5 in the type of its design and implementation, but it performs two different types of the parity calculations. It may also do the same calculations on the data that has the subsets that are overlapping. In comparison with the RAID 5, it has the additional independently calculated information that is redundant. This comparison was drawn on the lines of the disk description that can be provided along with the RAID 6. In the terms of the data reliability the RAID 6 has the highest degree of reliability. This is the highest degree of reliability even if all the other drives are considered. The reliability is the major supporting characteristic of the RAID 6 disk drive.
The reliability is the highest one in comparison with the other RAID devices like the RAID 3, RAID 2, RAID 4, RAID 5, RAID 1 and the RAID 1+0. In the terms of the data transfer the speed of the RAID 6 is similar to the one involved in the data stripping and that is for the read operation. But the write operation in the case of the RAID 6 is much slower than the RAID 5. In fact the RAID 5 had the write operation very much slower than even the single disk operation. So in comparison the RAID 6 has the much slower data transfer rate when we talk about the write operation. This might also be the reason for the non usage of the RAID 6 in contrast with the other types of RAID available.
Even the I/O (Input/Output) operation for the RAID is much similar to the data transfer of the operations. In the Input Output operations the read operations speed is similar to that of the operation in the drives that have the data stripping, that is it is similar to the one in the other RAID drives that provide the data stripping; for example the RAID 5.
In the case of the write operations the Input Output speed is much similar to the speed of operations in the data transfer. The Input Output speed of the write operation in the RAID 6 is very much slower than the speed of write operation in the RAID 5. And as obvious fact the speed of write operation in the RAID 5 was much slower than in the case of the single disk operation.
The RAID 6 has the increased reliability of the data. It does this by utilizing the two parity stripes. These two parity stripes allows for two disk failures that may occur within the RAID disk drive set even much before the data is lost. The application of the RAID 6 is that in the SATA, IDE and the SCSI environments. Most of the solutions may require a large and the longer retention of the data that is the data retention period. The example for the above explained feature is such as back up based on the disk and the data archiving.
The RAID is actually a technique of joining the physical disk drives to form a large group set called or known as the RAID set. The important aspect or the feature of the RAID 6 is its data availability and the reliability. Also the RAID 6 has a disadvantage regarding the writing speed; hence this is a major issue while implementing the RAID 6 server. Most the data bases require high speed of writing for the implementation of the RAID server. The write operation’s speed may limit the future prospects of the RAID 6. But this RAID 6 is the most suitable server for the small and the medium sized databases. The high density or the large data bases may not be suitable for the RAID 6.
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