Exam SK0-005 topic 1 question 208 discussion

C. RAID 5

Answer is C. You can only install RAID 10 on even number of disks: https://www.ibm.com/docs/en/power9/0009-ESS?topic=srl-raid-10-1.

You can't set up raid 10 with 3 discs, has to be raid 5 - answer C

Agree D

The RAID level that would yield the BEST combination of available space and redundancy in this scenario is RAID 5. RAID 0 provides no redundancy and would not be a suitable choice for a database server where data protection is crucial. RAID 1 provides disk redundancy by mirroring two drives but would result in only half of the total storage capacity being available. In this case, the three remaining drive bays would provide less storage than RAID 5. RAID 10 provides both disk redundancy and increased storage capacity by combining mirroring and striping. However, since there are only three remaining drive bays, it would not be possible to set up RAID 10. RAID 5 provides a good balance of storage capacity and disk redundancy by striping data across multiple disks with parity data distributed among the disks. This configuration requires at least three drives and can withstand the failure of one disk. In this scenario, RAID 5 would provide the best balance of available space and redundancy for the remaining three drive bays.

In this scenario, the administrator has two mirrored drives for the operating system, leaving three drive bays for storage. The best RAID level that would yield a combination of available space and redundancy would be RAID 10. RAID 5 provides a good balance of available space and redundancy, but requires at least three disks. It uses parity data to allow recovery of data in the event of a single disk failure.