技術者が NAS ユニットに 7.2K rpm ハード ドライブのペアをインストールしています。セットアップで最高レベルのパフォーマンスを実現するのは次のどれですか。
正解:D
RAID 10 (also known as RAID 1+0) is a RAID level that combines the benefits of RAID 1 (mirroring) and RAID 0 (striping). This means that data is written to both drives in the array, which provides redundancy in case of a drive failure. The data is also striped across both drives, which can improve performance.
In the case of a pair of 7.2K rpm hard drives, RAID 10 will provide the highest levels of performance because it combines the speed of RAID 0 with the redundancy of RAID 1.
RAID 0 (striping) will also provide good performance, but it does not offer any redundancy. This means that if one drive in the array fails, all of the data on the array will be lost.
RAID 1 (mirroring) provides redundancy, but it does not offer any performance benefits. This is because data is written to both drives in the array, which can slow down performance.
RAID 5 (striping with parity) can provide good performance and redundancy, but it is not as efficient as RAID 10. This is because parity data is added to each drive in the array, which takes up some space and can slow down performance.
Therefore, RAID 10 is the best choice for a pair of 7.2K rpm hard drives because it offers the best combination of performance and redundancy.