Q5 File System Backup and Restore

Question 1

Question: Suppose you have an incremental backup of a file system for the past 10 days as below: Day 1 2 3 4 5 6 7 8 9 10 Backup FB IB1 IB2 IB3 IB4 FB IB1 IB2 IB3 IB4 where FB means “full backup” and IB means “incremental backup”.

For example, IB3 means ”incremental backup level 3”.
According to the backup schedule, a full backup was made on day 1 and day 6, and incremental backups were made for other days.

Suppose, for some reason, you want to restore the file system of Day 8, what procedure will you follow with these backups? You should also explain why.

Answer 1

Restoration Procedure for Day 8: To restore the file system to its state at the end of Day 8, you need to apply the changes sequentially from the most recent full backup up to the desired state.
1. Restore the Full Backup (FB) from Day 6
2.Restore the Incremental Backup (IB1) from Day 7
3. Restore the Incremental Backup (IB2) from Day 8:

Applying this restores the file system to its state at the end of Day 8.