AWS Certified Solutions Architect – Professional SAP-C01 – Question236

Out of the striping options available for the EBS volumes, which one has the following disadvantage: 'Doubles the amount of I/O required from the instance to EBS compared to RAID 0, because you're mirroring all writes to a pair of volumes, limiting how much you can stripe.'?

A.
Raid 1
B. Raid 0
C. RAID 1+0 (RAID 10)
D. Raid 2

Correct Answer: C

Explanation:

Explanation: RAID 1+0 (RAID 10) doubles the amount of I/O required from the instance to EBS compared to RAID 0, because you’re mirroring all writes to a pair of volumes, limiting how much you can stripe.
Reference:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/raid-config.html