An administrator is building a server RAID for a database that requires a large number of drives and the greatest possible fault tolerance. Which of the following RAID configurations should the administrator **most likely** select?
RAID 10 provides the greatest possible fault tolerance for a database requiring a large number of drives.
RAID 10 combines the benefits of RAID 1 (mirroring) and RAID 0 (striping), offering both redundancy and performance. This configuration allows for fault tolerance by mirroring data across multiple drives while also enhancing read and write speeds through striping, making it ideal for high-demand database applications.
RAID 0 offers no fault tolerance as it stripes data across multiple drives but does not include any redundancy. If a single drive fails in a RAID 0 configuration, all data is lost. This makes it unsuitable for critical applications like databases that require high availability and reliability.
While RAID 1 provides fault tolerance through data mirroring, it is limited in terms of performance and storage efficiency. Each drive in a RAID 1 array is duplicated, which means that only half of the total drive capacity is usable for data storage. Although it offers redundancy, it does not enhance performance to the level required for large database operations compared to RAID 10.
RAID 8 is not a standard RAID configuration recognized in traditional RAID levels. This option may refer to a proprietary RAID setup, but it lacks widely accepted definitions and guidelines. Therefore, it cannot be recommended for a scenario requiring fault tolerance and performance without further context.
RAID 10 is the optimal choice for fault tolerance and performance, as it combines both mirroring and striping. This configuration allows for the loss of one drive in each mirrored pair without losing any data, striking a balance between redundancy and speed. It effectively supports the requirements of a database needing extensive drive capacity while maximizing reliability.
When constructing a server RAID for a database that demands a large number of drives and high fault tolerance, RAID 10 emerges as the most suitable configuration. It ensures data redundancy through mirroring and enhances performance via striping, making it ideal for critical data applications. Other RAID levels either lack the necessary fault tolerance or do not support the performance demands of modern databases.
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