AWS Certified Solutions Architect – Professional — Question 964

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.'?

Answer options

Correct answer: C

Explanation

RAID 1+0 (RAID 10) provides data redundancy by mirroring data across pairs of striped volumes, which doubles the write I/O load compared to a non-redundant RAID 0 array. RAID 0 offers striping without mirroring (no I/O doubling), RAID 1 mirrors without striping, and RAID 2 is not a standard or supported option for EBS volumes.