# Use the following data to calculate the effects of different backup approaches. Which approach would you recommend?

## Question:

Use the following data to calculate the effects of different backup approaches. Which approach would you recommend? Why? Consider the time required to backup, the amount of media that must be dedicated to backup and retained to enable complete restoration, and the time required for restoration.

a. Full daily backup:

• time to backup = 60 minutes

• size of backup = 50 GB

• time to restore = 60 minutes

b. Weekly full backup on Fridays plus daily incremental backup:

• time to backup = 60 minutes for full backup, 10 minutes for incremental

• size of backup = 50 GB for full backup, 8 GB on average for incremental backup

• time to restore = 60 minutes for full backup, 5 minutes for each incremental backup day

c. Weekly full backup on Fridays plus daily differential backup:

• time to backup = 60 minutes for full backup, 15 minutes for differential

• size of backup = 50 GB for full backup, 6-30 GB for differential backups depending on how many days since last backup

• time to restore = 60 minutes for full backup, 8 minutes on average for differential backup

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