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1.2 Acronis True Image Home basic concepts
This section provides general information about basic concepts which could be useful for
understanding how the program works.
Backup
According to Wikipedia, "backup refers to making copies of data so that these additional copies may
be used to restore the original after a data loss event. Backups are useful primarily for two purposes.
The first is to restore a state following a disaster (called disaster recovery). The second is to restore
small numbers of files after they have been accidentally deleted or corrupted."
Acronis True Image Home provides for both purposes by creating disk (or partition) images and
file-level backups respectively. By default, Acronis True Image Home stores in an image only those
hard disk parts that contain data (for supported file systems). However, you may use an option that
lets you include in an image all of the sectors of a hard disk (so called sector-by-sector backup). When
you back up files and folders, only the data, along with the folder tree, is compressed and stored.
Disk cloning
This operation migrates/copies the entire contents of one disk drive to another (e.g., when installing
a larger disk) to get two identical drives with the same file structure. The "Disk Clone" tool effectively
copies all of the contents of one hard disk drive onto another hard disk drive. The operation allows
you to transfer all the information (including the operating system and installed programs) from one
hard disk drive to another without having to reinstall and reconfigure all of your software. If you
decide to use cloning, the best chance of success is to remove the existing drive from the computer
and install the new drive in its place. It should be connected in exactly the same way as the old drive.
Acronis True Image Home does not provide for cloning a single partition. You can clone only an entire
drive.
By the way, you can also transfer all the information from your hard disk drive to another one by
backing up the entire old hard disk and then recovering the backup to the new disk.
Backup archive components
Archive - Known as archive chain or archive group, it is the whole set of backup files managed by a
single backup task. The archive can consist of one or several slices.
Slice - It is a set of files created during each cycle of the task execution. The amount of slices created
is always equal to the amount of times the task is executed. A slice represents a point in time, to
which the system or data can be recovered.
Volume - It is a tib file associated with the slice. Usually there is only one volume per slice however,
each slice may consist of several volumes. If you have set archive splitting in the task options, the
resulting slice will be split into several files. In addition, Acronis True Image Home automatically splits
a slice into several files of 4GB each (except the last file) when you make a large backup to a FAT32
formatted hard disk. These files are the slice's volumes.
Snapshots
While creating disk images, Acronis True Image Home uses "snapshot" technology that allows
creating even system partition backups while running Windows with files open for reading and
writing without the necessity to reboot the computer. Once the program starts the partition backup
process, it temporarily freezes all the operations on the partition and creates its "snapshot". Snapshot
creation usually takes just several seconds. After that the operating system continues working as the
