350-601 Storage Network Practice Question
Which RAID level provides striping with parity and can tolerate a single disk failure while offering higher storage efficiency than RAID 1?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
RAID 5
RAID 5 uses block-level striping with distributed parity, allowing recovery from a single disk failure with good storage efficiency (one disk worth of parity).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
RAID 0
Why it's wrong here
RAID 0 has no redundancy.
- ✓
RAID 5
Why this is correct
RAID 5 offers striping with parity and single disk fault tolerance.
- ✗
RAID 6
Why it's wrong here
RAID 6 can tolerate two disk failures but uses more parity.
- ✗
RAID 1
Why it's wrong here
RAID 1 mirrors data, providing high redundancy but low efficiency.
Quick reference
RAID Level Comparison
| RAID Level | Min Disks | Fault Tolerance | Read | Write | Usable Capacity |
|---|---|---|---|---|---|
| RAID 0 | 2 | None | Excellent | Excellent | 100% |
| RAID 1 | 2 | 1 disk | Good | Moderate | 50% |
| RAID 5 | 3 | 1 disk | Good | Moderate | 67–94% |
| RAID 6 | 4 | 2 disks | Good | Lower | 50–88% |
| RAID 10 | 4 | 1 disk per mirror | Excellent | Good | 50% |
RAID is not a backup strategy — it protects against disk failure but not against accidental deletion, ransomware, or site-level events.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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