A technician installs two identical hard drives in a desktop computer and must choose a RAID configuration that will allow the system to keep running without any data loss if one of the drives fails. Which RAID level should the technician implement?
RAID 10
RAID 1
RAID 0
RAID 5
RAID 1 mirrors the contents of one disk to the other, so every block of data exists on both drives. If either drive fails, the array continues to operate from the surviving disk, and no data is lost. RAID 0 provides no redundancy and would lose all data if a single disk failed. RAID 5 can survive one disk failure but requires at least three drives and protects data with distributed parity rather than mirroring. RAID 10 combines striping and mirroring and tolerates certain disk failures, but it requires a minimum of four drives, so it does not fit the two-drive scenario described.
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