A server has four 300 GB SAS hard drives and a RAID card. The server will initially need 300 GB of storage space, and is estimated to grow to 400 GB. Which of the following RAID configurations should be deployed?

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B. RAID 5 with a hot spare RAID 5 provides fault tolerance by distributing parity across all drives, allowing for one drive failure without data loss, and offers (N-1)*DiskSize usable capacity. With four 300GB drives, RAID 5 yields 900GB of usable storage ((4-1)*300GB), comfortably meeting the 400GB requirement while allowing one drive to be configured as a hot spare for automatic rebuilds.

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A. RAID 1 with a hot spare RAID 1 (mirroring) on four drives would yield only 300GB of usable space in a single array, which is insufficient for the 400GB requirement.

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C. RAID 10 with a hot spare RAID 10 (RAID 1+0) on four drives provides 600GB of usable space, which meets the requirement but is less storage efficient than RAID 5 for this specific capacity need and drive count.

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D. RAID 50 with a hot spare RAID 50 requires a minimum of six drives (two sets of RAID 5 arrays), making it impossible to implement with only four drives.

A server has four 300 GB SAS hard drives and a RAID card. The server will initially need 300 GB of storage space, and is estimated to grow to 400 GB. Which of the following RAID configurations…

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