In a server environment, which RAID configuration offers the best fault tolerance?

RAID 10, also known as RAID 1+0, combines the features of RAID 1 and RAID 0, which provides both redundancy and improved performance. In a RAID 10 configuration, data is mirrored across pairs of disks (like RAID 1), ensuring that if one disk in the mirror fails, the data is still safe on the other. This mirroring protects against data loss due to drive failures.

Additionally, RAID 10 stripes data across multiple sets of mirrored drives (similar to RAID 0), enhancing read and write performance. This dual benefit of redundancy from mirroring and speed from striping makes RAID 10 the most fault-tolerant option among typical RAID configurations. It can withstand the failure of one disk in each mirrored pair without losing data, making it a robust choice for critical applications.

While RAID 1 offers good redundancy, it doesn't scale well in terms of usable capacity as it requires double the disks for mirroring. RAID 5 offers a balance of performance and data protection using parity, but it can only sustain one disk failure without losing data. Meanwhile, RAID 0 has no redundancy and offers the worst fault tolerance since the failure of a single disk results in total data loss. Thus, RAID 10