Unix and Linux-like operating systems have a single-rooted directory tree. In Microsoft Windows, each hard disk will get a drive letter (starting with C:, A: or B: are reserved for floppy drives). When hard disks are used, they are available to the operating system. Normal hard disks use magnetism to store information. Introduction Difference between physical Disks and logical disks Ī hard disk is a part of a computer. Such systems can be used to store music or movies, for example. For this reason, even some computers and appliances that are used at home have some RAID functions. Since its discovery, the cost of building a RAID system has come down a lot. There are different ways in which RAID systems can be made. Ĭompanies have used RAID systems to store their data since the technology was made. Most of the work on RAID is based on a paper written in 1988. Certain kinds of errors will make it impossible to read the data. Depending on the configuration and the size of the disks, this reconstruction can take a long time. After the failed disks have been replaced, the data needs to be reconstructed.
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