Bedienungsanleitung Acronis Disk Director suite 9 (Seite 125 von 126) (Englisch)

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Glossary

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Partition. An independent area on a hard disk where a file system can be located.

A partition can be either primary or logical, depending on its position in the

partition structure. One of the primary partitions of a hard disk may be active. A

partition has the following attributes: type, beginning and size. Some partition

management software and boot managers allow for the hiding of partitions.

Information about partitions is stored in the partition table.

Partitioning. The process of creating the logical structure on a hard disk.

Partitioning is usually done with programs such as FDISK — a component of

DOS and Windows. Disk Administrator completely replaces FDISK where

functionality is concerned and allows performance of many additional useful

operations.

Partition structure. All the partitions on a hard disk make a tree with the root in

the MBR partition table. Many operating systems and programs assume that any

partition table but MBR can contain not more than one partition entry and one

table entry. This simplifies the partition structure greatly – all the logical

partitions form one chain.

Partition table. It is the table that contains the information about partitions and

links to other partition tables. A partition table cannot have more than four

entries. The main partition table is located in the hard disk MBR, and the other

partition tables are called extended. Partition tables are usually stored in the first

sector of a cylinder.

Physical disk. A disk that is physically a separate device. Thus, floppy disks, hard

disks and CD-ROMs are physical disks.

Primary partition. The partition, information about which is contained in the MBR

partition table. The majority of operating systems can be booted only from the

primary partition of the first hard disk, but the number of primary partitions is

limited.

Root folder. The folder where the folder tree of a file system begins. Starting

from the root folder, one can uniquely describe the file position on the folder tree

by sequentially naming all the intermediate nested folders, e.g.:

\WINDOWS\SYSTEM\VMM32.VXD. Here the WINDOWS folder is a subfolder of

the root folder, the SYSTEM folder is a subfolder of the WINDOWS folder, and

the VMM32.VXD file is located in the SYSTEM folder.

Sector. It is the smallest information unit on a disk that is transferred in a single

read or write operation. Usually a sector is 512 bytes in size. A sector on a disk

can be addressed two ways: via the absolute number (see absolute sector) or via

cylinder, head and sector number on a track.

System disk/partition is a disk/partition from which an operating system may be

booted. Such a disk usually contains the boot sector and system files of this

operating system.

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