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104 Appendix E:An Introduction to Disk Partitions

drives with a greater capacity, but the overhead imposed by the filesystem to track files became ex-

cessive.

The solution to this problem was to divide disks into partitions. Each partition can be accessed as if

it was a separate disk. This is done through the addition of a partition table.

Note

While the diagrams in this chapter show the partition table as being separate

from the actual disk drive, this is not entirely accurate. In reality, the partition

table is stored at the very start of the disk, before any filesystem or user data.

But for clarity, we will keep it separate in our diagrams.

Figure E–5 Disk Drive with Partition Table

As Figure E–5, Disk Drive with Partition Table shows, the partition table is divided into four sections.

Each section can hold the information necessary to define a single partition, meaning that the partition

table can define no more than four partitions.

Each partition table entry contains several important characteristics of the partition:

• The points on the disk where the partition starts and ends

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Red Hat Linux Itanium 7.2 Manuale Utente Pagina 104