Acronis Backup for Linux Server - User Guide - Manual (Page 210)

210 Copyright © Acronis International GmbH, 2002-2014
Tower of Hanoi
A popular backup scheme (p. 200) aimed to maintain the optimal balance between a backup archive
(p. 199) size and the number of recovery points (p. 208) available from the archive. Unlike the GFS (p.
206) scheme that has only three levels of recovery resolution (daily, weekly, monthly resolution), the
Tower of Hanoi scheme continuously reduces the time interval between recovery points as the
backup age increases. This allows for very efficient usage of the backup storage.
For more information please refer to "Tower of Hanoi backup scheme (p. 49)".
U
Unmanaged vault
Any vault (p. 210) that is not a managed vault (p. 207).
V
Validation
An operation that checks the possibility of data recovery from a backup (p. 199).
Validation of a file backup imitates recovery of all files from the backup to a dummy destination.
Validation of a disk backup calculates a checksum for every data block saved in the backup. Both
procedures are resource-intensive.
While the successful validation means a high probability of successful recovery, it does not check all
factors that influence the recovery process. If you back up the operating system, only a test recovery
under the bootable media to a spare hard drive can guarantee successful recovery in the future.
Vault
A place for storing backup archives (p. 199). A vault can be organized on a local or networked drive or
detachable media, such as an external USB drive. There are no settings for limiting a vault size or the
number of backups in a vault. You can limit the size of each archive using cleanup (p. 202), but the
total size of archives stored in the vault is limited by the storage size only.
Virtual machine
On Acronis Backup Management Server (p. 207), a machine (p. 207) is considered virtual if it can be
backed up from the virtualization host without installing an agent (p. 199) on the machine. Such
machine appears in the Virtual machines section. If an agent is installed into the guest system, the
machine appears in the Machines with agents section.
W
WinPE (Windows Preinstallation Environment)
A minimal Windows system commonly used by OEMs and corporations for deployment, test,
diagnostic and system repair purposes. A machine can be booted into WinPE via PXE, CD-ROM, USB
flash drive or hard disk. Acronis Plug-in for WinPE (p. 198) enables running the Acronis Backup Agent
(p. 199) in the preinstallation environment.