Data Backup Flashcards
What is data backup?
Data backup is the process of copying and archiving computer data to restore it in the event of data loss. This loss can stem from various scenarios, hardware malfunctions, accidental deletions, software corruption, and increasingly, cyber-attacks such as ransomware.
Why are backups necessary?
-Hardware failure
-Accidental
deletion/modification
-Cyber threats
-Software issues
-Corrupt files/inaccessible
datasets
What is the 3-2-1 strategy?
A golden rule in the realm of data backup is the 3-2-1 strategy. This approach advises having the following three copies of your data, one primary copy and two backups. Two different media types such as hard drives and
cloud storage to avoid reliance on one form of storage. And one offsite copy to protect against physical disasters like fires or floods that could destroy all local copies. Following this rule will maximize data availability and minimize risks associated with data loss.
What’s to be considered in a backup solution?
-Sensitivity/volume of the
data
-Frequency of backups
-Budget
-Security
-Accessiblity
What is a full backup?
A full backup involves creating a complete copy of all data in an external storage location. This method ensures that a single copy contains every data piece, making restoring the system is straightforward.
What is an incremental backup?
Incremental backups save only the data that has changed since the last backup, whether it was a full backup or a previous incremental backup. This method significantly reduces the data you need to copy in each operation.
What is mirroring in data backup?
Mirroring involves creating a replica of the data set on another device or storage media in real time, which can be synchronized at specified intervals.
What is backup media?
The choice of backup media is critical, affecting the speed, capacity, cost, and longevity of backups.
What are the steps to a backup strategy?
-Data criticality
-Recovery time objective
(RTO)
-Compliance req
-Budgets
-Hybrid approach
