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In the GFS backup tape rotation plan, which type of backup is the Grandfather?
A. copy
B. normal
C. differential
D. incremental
Correct Answer: B
Explanation/Reference:
Industry Standard Architecture – Student Guide 2 – Page 302
Grandfather-Father-Son tape rotation
The Grandfather-Father-Son (GFS) tape rotation scheme is the most commonly used and requires a weekly backup capacity of at least double the server storage capacity. It uses three levels of backup to provide redundancy and security. Among other things, this scheme allows for different levels of data retention. The system administrator can select which generation of tapes to store temporarily and which to archive.
GFS backup requires the following:
Monthly grandfathers
Weekly fathers
Daily sons
Example
The system administrator typically performs a full backup every Monday (father) and incremental backups on Tuesdays, Wednesdays, and Thursdays (sons). The administrator performs another full backup at the end of the week (father) and another at the end of the month (grandfather).
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