What is a partition ?

Partitioning is a means to divide a single hard drive into many logical drives. A partition is a contiguous set of blocks on a drive that are treated as an independant disk. A partition table (the creation of which is the topic of this HOWTO) is an index that relates sections of the hard drive to partitions.

Why have multiple partitions?

• Encapsulate your data. Since file system corruption is local to a partition , you stand to lose only some of your data if an accident occurs.
• Increase disk space efficiency. You can format partitions with varying block sizes, depending on your usage. If your data is in a large number of small files (less than 1k) and your partition uses 4k sized blocks, you are wasting 3k for every file. In general, you waste on average one half of a block for every file, so matching block size to the average size of your files is important if you have many files.
• Limit data growth. Runaway processes or maniacal users can consume so much disk space that the operating system no longer has room on the hard drive for its bookkeeping operations. This will lead to disaster. By segregating space, you ensure that things other than the operating system die when allocated disk space is exhausted.

For more information, please, follow this link: http://tldp.org/HOWTO/Partition /index.html

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