Implement Backup and Recovery Flashcards
lesson 19B (27 cards)
Configuring File History backup options via Windows Settings.
Using File History to restore to an alternate location.
Backup is essential for
protecting data and system settings, but its effectiveness depends on thorough planning, regular testing, and adaptability to unexpected disaster scenarios.
Backup operations involve
storing copies of critical data to prevent loss due to corruption or hardware failure, ensuring efficient recovery when needed.
Home users and small workgroups without a central file server
rely on personal backups:
- Windows’ built-in tools
- external hard drives
- cloud storage
Windows provides user data backup through
File History feature:
* accessible via Settings > Update & Security > Backup.
* designate a local drive or network folder
* select specific files and folders for inclusion or exclusion
* schedule automated backup tasks
In Windows, users can restore lost or modified files using
the Previous Versions tab in an object’s Properties dialog or the File History applet for multiple file recovery.
Backup and Restore Center in Windows offers
an alternative backup solution, allowing users to manage data backups and create full system image backups for comprehensive recovery.
Backup methods for file and database servers
must be strategically planned to balance storage limitations with effective data protection, ensuring that backup jobs capture essential recovery points while minimizing unnecessary data redundancy.
Backup frequency
determines how often data is saved, balancing the ability to recover lost work with operational efficiency—daily backups may suffice for easily reconstructed tasks, while critical edits require more frequent snapshots.
Retention
determines how long backup data is stored, balancing short-term needs like version control and malware recovery with long-term legal, policy, and industry compliance requirements.
Backup chains
help balance frequency, retention, storage capacity, and job completion time by using different backup types: full only, full with incremental, and full with differential.
full-only backup
captures all data from the source, creating a file equal in size to the original, though compression can reduce its footprint; it requires significant storage and time but simplifies recovery since only a single file is needed.
full with incremental
backup starts with a full backup, followed by incremental jobs that capture only new or modified files since the last backup, minimizing time and storage use but increasing recovery complexity due to multiple dependencies across different media.
synthetic backup
reduces data transfer requirements by creating a full backup from previously stored backup jobs rather than directly from the original data, optimizing efficiency while maintaining recovery integrity.
GFS
backup rotation scheme
enables media reuse after the retention period expires, with the grandfather-father-son (GFS) method being the most common, categorizing tapes into generations where
* son tapes store recent data (short retention)
* grandfather tapes keep older backups (long retention).
GFS
weekly full backup
is conducted each Friday night using Father tapes, requiring five tapes to account for months with five Fridays, ensuring consistent data retention.
GFS
Incremental backups
are performed daily on Son tapes, with backup frequency set based on operational needs (e.g., every 15 minutes or hourly), and the five tapes are reused each week in a predefined sequence.
GFS
monthly full backup
is conducted on the last working day using Grandfather tapes, requiring twelve tapes to ensure long-term data retention.
GFS
Father tapes
are reused each month in the same sequence, ensuring continuity, while at the end of the year, the first Grandfather tape is overwritten to maintain the rotation cycle.
GFS
longer version-control window
can be achieved by using bi-weekly Son tape rotation, doubling the number of tapes, while Father tapes can employ synthetic backups for efficient storage management.
On-site storage
keeps production systems and backup media together, increasing disaster risks, while off-site storage—enabled by GFS rotation or cloud solutions—enhances data safety and recovery reliability.
Online backups
offer immediate access for backup and recovery without manual intervention, while offline backups require manual connection but provide better security against threats like crypto-ransomware, which can encrypt connected storage.
A media rotation scheme, such as GFS, ensures at least one backup copy remains offline to prevent data loss from malware.
3-2-1 backup rule
It ensures resilience by maintaining:
* three copies of data (including the original), stored on
* two different media types, with
* one copy kept offline and off-site, minimizing the risk of total data loss in various disaster scenarios.