Which RAID level allows for data recovery if two drives fail in the array?

RAID 5 is notable for its ability to withstand the failure of a single drive while still providing redundancy through parity data. However, it is important to recognize that RAID 5 cannot recover from the simultaneous failure of two drives. Given the context of data recovery after two drive failures, RAID 10 would be the correct answer instead.

RAID 10, which is a combination of RAID 1 and RAID 0, allows for data mirroring and striping. In a typical RAID 10 setup, data is mirrored across multiple pairs of disks, meaning that if two drives fail, as long as they are from different mirrored sets, the data can still be recovered. For example, if one drive from one mirror pair and one drive from the other mirror pair fail, the data remains intact and accessible from the remaining drives.

In contrast, RAID 0 offers no redundancy at all, as data is striped but not mirrored. This means that if any single drive fails, all data in the RAID 0 array is lost. RAID 1 provides full redundancy through mirroring, but it can only tolerate the loss of one drive from each mirrored pair. Similarly, while RAID 5 provides redundancy, it can only handle a single drive failure due to