AWS Certified Sysops Administrator Associate · Free Practice Question Medium
Question 5
An EBS-backed Amazon EC2 instance has a data volume with a status of impaired. I/O has also been disabled due to data consistency issues. Which first step should a SysOps Administrator take to recover the volume?
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A
Attach an Elastic Fabric Adapter (EFA) to the instance and restart I/O.
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B
Perform a consistency check on the volume attached to the instance.
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C
Recreate the volume by restoring an Amazon EBS snapshot.
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D
Change the volume to a general purpose SSD volume type.
Reveal correct answer
Correct answer: B
Explanation
The simplest option is to enable I/O and then perform a data consistency check on the volume while the volume is still attached to its Amazon EC2 instance. The steps are:
Stop any applications from using the volume.
Enable I/O on the volume.
Check the data on the volume.
CORRECT: "Perform a consistency check on the volume attached to the instance" is the correct answer.
INCORRECT: "Recreate the volume by restoring an Amazon EBS snapshot" is incorrect. This is not the first step as the snapshot my not be fully up to date so recovering the existing volume should be attempted first.
INCORRECT: "Change the volume to a general purpose SSD volume type" is incorrect. There is no reason to change volume types when data consistency is the issue.
INCORRECT: "Attach an Elastic Fabric Adapter (EFA) to the instance and restart I/O" is incorrect. Attaching an EFA is not a useful step for this scenario.
References:
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring-volume-status.html
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Discussion
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