78 Copyright © Acronis, Inc., 2000-2010
After the two volumes are merged into one, the resulting volume has the drive letter and volume
label of the main volume.
Master boot record (partitioning scheme)
One of the two partitioning schemes of a disk. See Partitioning scheme (p. 79).
Master boot record (sector)
The first sector (p. 80) on a hard disk (p. 76).
This sector usually stores information about the hard disk partitioning (p. 79). It also stores a small
program that initiates the booting (p. 72) of the machine.
MBR disk
A disk whose partitioning scheme (p. 79) is master boot record (MBR).
MBR disks are typically used by 32-bit operating systems, such as Windows XP Professional.
Media builder
A dedicated tool for creating bootable media.
Mirror
Each of the two portions of disk space that make up a mirrored volume (p. 78).
Each mirror occupies a separate hard disk.
Both mirrors are identical in size and content, which ensures fault tolerance in case a hard disk with
one of the mirrors fails.
The operation of converting a simple volume (p. 80) to mirrored is called adding a mirror.
Mirrored volume
A fault-tolerant volume whose data is duplicated on two physical disks (p. 79).
Each of the two parts of a mirrored volume is called a mirror.
All of the data on one disk is copied to another disk to provide data redundancy. If one of the hard
disks fails, the data can still be accessed from the remaining hard disks.
Volumes that can be mirrored include the system volume (p. 81) and a boot volume (p. 72).
A mirrored volume is sometimes called a RAID-1 volume.
P
Partition type
A hexadecimal number that normally identifies the type of a volume or the volume’s file system (p.
75).
For example, a partition type of 07h identifies a volume whose file system is NTFS.
