Tape Rotation

Question 1

What are the three types of tape rotation?

Answer 1

10 Tape Rotation
Grandfather-Father-Son
Towers of Hanoi

Question 2

What tape rotation is used once per day for two weeks and then is recycled for reuse?

Answer 2

10 Tape Rotation

Note: It’s not a 14 tape rotation because most companies close on weekends. You could also just use 14 tapes if weekends also need to be backed up.

Question 3

What tape rotation uses three sets of backup tapes that use a daily, weekly, and monthly tape?

Answer 3

Grandfather-Father-Son

Note: Commonly used
Grandfather is Monthly
Father is Weekly
Son is Daily

Grandfather is generally kept off site in case of disaster in the server room

Question 4

What tape rotation uses three sets of backups but use a more complex rotation system?

Answer 4

Towers of Hanoi

Question 5

What type of backup system is used more recently because of virtualization and the affordability of hard drives?

Answer 5

Snapshot backup

Note: Snapshot is commonly used with virtualization

Question 6

How does a snapshot backup work?

Answer 6

It captures the entire OS image including all of the applications and data