A company uses a batch processing system to update inventory records overnight. The 'Grandfather-Father-Son' backup rotation scheme is used. On Thursday morning, the 'Son' (Wednesday night's backup) is found to be corrupted. To restore the system to the most current state possible before the corruption, which tapes are required?

Answer options:

The Grandfather tape and Wednesday's transaction logs

The Father tape and Wednesday's transaction logs

The Father tape only

The Grandfather tape and the Father tape

How to approach this question

Identify the most recent valid full backup (Father) and what is needed to bridge the gap (Transaction Logs).

Full Answer

B.The Father tape and Wednesday's transaction logs✓ Correct

In a Grandfather-Father-Son scheme, if the daily (Son) backup fails, the recovery point is the previous weekly or daily (Father) backup. To restore fully, you need that previous backup plus the transaction logs created since that backup was taken.

Common mistakes

Thinking the Father tape alone is sufficient (results in data loss).

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