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What is RAID?- RAID stands for Redundant Array of Inexpensive Disks.
- There are six RAID levels 0 through 5 offering different levels of performance and providing the RAID fault tolerance to the database servers.
It can be created by two ways:
1. Hardware RAID
2. Software RAID
- All the types of RAID are based on striping, mirroring, parity.
- Striping is the splitting the flow of data into blocks of a certain size.
- Mirroring is a storage technique where the copies of data are stored.
- Parity is a storage technique which is utilized striping and checksum methods.
1. Hardware RAID:
- It is created using separate hardware.
- It allows user to create boot partitions.
- It supports hot-swapping.
- It handles errors better, since communicates with the devices directly.
2. Software RAID:
- It is one of the cheapest RAID solutions.
- It is created which is mostly based on the user's computer.
- It does not implement the hot-swapping.
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