350-601 Compute Practice Question
An engineer is deploying a HyperFlex cluster and needs to ensure that if a disk fails in a hybrid node, the system can rebuild the data from parity. Which RAID configuration is required on the disk controller for the cache SSD and HDDs in a HyperFlex hybrid node?
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 0 for SSD and RAID 5 for HDDs
In HyperFlex hybrid nodes, the cache SSD is configured as RAID 0 (striping without parity) for performance, while the HDDs can be configured as RAID 5 or RAID 6 for redundancy. For the SSD cache, RAID 0 is typically used because data is replicated at the cluster level.
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 6 for SSD and RAID 0 for HDDs
Why it's wrong here
RAID 6 on SSD is not typical for cache; HDDs need redundancy.
- ✓
RAID 0 for SSD and RAID 5 for HDDs
Why this is correct
RAID 0 on SSD provides maximum performance; RAID 5 on HDDs provides redundancy.
- ✗
RAID 10 for both SSD and HDDs
Why it's wrong here
RAID 10 would reduce usable capacity significantly.
- ✗
RAID 1 for SSD and RAID 5 for HDDs
Why it's wrong here
RAID 1 is not used for SSD cache; it would reduce capacity.
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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