RAID involves the use of at least two storage drives for a single server or computer system. If you ever experience RAID failure, it is probably because one of these storage drives has malfunctioned or been corrupted somehow. But it could also mean that a configuration problem exists too.
RAID fails when it does not perform the job it is supposed to do. For instance, if you want to increase the performance of your computer system with a RAID 0 level configuration, then you will know something is wrong if the performance starts to diminish or you lose data and cannot retrieve it. To help you better understand this concept, let's examine the most common RAID failures and how they can be resolved.
A hard disk drive can contain one or more file systems called partitions. When data is written to your hard disk drive, it is stored within a partition on the difference between computer science and computer engineering. The file system is how the system can organize and retrieve files quickly. If data were written to the disk drive in random places without a file system, then your system wouldn't know where to retrieve the data when you want to execute it.
Your system will report corrupted partitions as "missing partitions." You will see this message when you try to open or read specific files in the missing partition. It doesn't mean those files are unrecoverable, though. It just means your system doesn't know where they are because the file system is messed up.
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