Compression Various schemes can be employed to shrink the size of the source data to be stored so that it uses less storage space. Unstructured An unstructured repository may simply be a stack of or CD-Rs or DVD-Rs with minimal information about what was backed up and when. Some backup software looks at the date of the file and compares it with the last backup to determine whether the file was changed.
However, the data capacity of floppy disks failed to catch up with growing demands, rendering them effectively obsolete. Поэтому ИБП чаще всего выполняет две основные роли — сетевая фильтрация и обеспечение возможности завершения выполняемых процессов и сохранения информации при внезапном пропадания электропитания. Retrieved on 7 March 2007 ^ HIPAA Advisory. This approach also reduces bandwidth required to send backup data to its target media.
This is because the data being backed up changed in the period of time between when the backup started and when it finished. Backups must be performed in a manner that does not compromise the original owner’s undertaking. Contents Storage, the base of a backup system Data repository models Any backup strategy starts with a concept of a data repository. Partition layout The layout of the original disk, as well as partition tables and filesystem settings, is needed to properly recreate the original system.