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RAID: Many Disks, One Logical Drive

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RAID — combining several disks to trade capacity for speed (striping, RAID-0), redundancy (mirroring, RAID-1), or both (parity, RAID-5). Visualises a block landing across multiple disks and what happens when one disk dies.

RAIDstripingmirroringparityxor reconstructionredundancy
ForutsetterThe Inode: A File's Map to Its Blocks