Exam AWS Certified Solutions Architect - Professional topic 1 question 236 discussion

Answer is RAID 1 The resulting size and bandwidth of a RAID 1 array is equal to the size and bandwidth of the volumes in the array. For example, two 500 GiB Amazon EBS io1 volumes with 4,000 provisioned IOPS each will create a 1000 GiB RAID 0 array with an available bandwidth of 8,000 IOPS and 1,000 MiB/s of throughput or a 500 GiB RAID 1 array with an available bandwidth of 4,000 IOPS and 500 MiB/s of throughput.

C. RAID 1+0 (RAID 10)

C for sure

Raid 1 AWS also supports RAID 1 on Amazon EBS volumes, which creates a greater fault tolerance capability, and makes it ideal for use cases where data durability is part of the requirement. However, it does not provide write performance improvement because the data is written to multiple volumes simultaneously. RAID 10 improves performance on non-optimized queries and large write volumes. RAID 10 is prohibitively expensive on a cost-to-performance ratio. Optimizing schema yields exponentially better return on investment than RAID 10. RAID 10 makes EBS snapshots impossible -- disabling simple disk backups.

EBS volumes not regular volumes. By default ebs only supports raid 10 hence c.

Answer should be A (Raid 1), as we are limiting the striping here Raid 0 is used for stripping Raid 10 does both Stripping & mirroring but expensive

C is correct as RAID 1 doesn't do stripping.

C is correct

Answer A

Answer is A