Learn RAID
RAID provides disk-failure tolerance or striping. It never replaces backup.
Read each short explanation, work through the example, then answer a pop quiz. Every answer explains the reasoning. Incorrect answers unlock a fresh question on the same idea; the full lesson contains ten questions.
01Understand the basics
Ready to learnRedundant Array of Independent Disks (RAID) combines drives. Mirroring stores copies, striping spreads data, and parity stores recovery information. Some levels keep working after disk failures; RAID 0 has no redundancy. None of these mechanisms restores an accidentally deleted file.
02Compare capacity and tolerance
Ready to learnRAID 1 mirrors data. RAID 5 uses one disk-equivalent for parity; RAID 6 uses two. Conventional RAID 10 stripes across mirror pairs and needs an even number of at least four disks. RAID 01 instead mirrors whole stripe sets: the same capacity does not mean the same failure behaviour. RAID 50/60 stripe equal RAID 5/6 groups, so capacity depends on group count.
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03Plan recovery
Ready to learnA degraded array has lost some protection. Replace failed drives promptly, monitor the rebuild and test backups separately. A backup must survive the failure you are planning for.
You’ve practised all three sections.
First-attempt understanding and later practice are shown separately. Keep practising with the related tools or continue through the suggested path.
Put it to work
Apply what you’ve learned using the related tools.