Decision model
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Cluster decision page
RAID Level Selector
Choose drive count and planning priority, then jump directly to a matching scenario page for concrete usable capacity and tolerance values.
Decision model
Capacity, balanced, or resilience first
The selector gives a planning starting point. Use it to choose a candidate mode, then verify usable TB in the calculator.
Capacity First More usable TB
Balanced Middle path
Resilience First More rebuild margin
Decision matrix
| Drive Count | Priority | Suggested Mode | Scenario Link |
|---|---|---|---|
| 4 drives | Capacity First | RAID 5 | Open 4x 4TB |
| 4 drives | Balanced | RAID 5 | Open 4x 4TB |
| 4 drives | Resilience First | RAID 10 | Open 4x 4TB |
| 6 drives | Capacity First | RAID 5 | Open 6x 4TB |
| 6 drives | Balanced | RAID 6 | Open 6x 4TB |
| 6 drives | Resilience First | RAID 6 | Open 6x 4TB |
| 8 drives | Capacity First | RAID 5 | Open 8x 4TB |
| 8 drives | Balanced | RAID-Z2 | Open 8x 4TB |
| 8 drives | Resilience First | RAID 6 | Open 8x 4TB |
| 10 drives | Capacity First | RAID 5 | Open 10x 4TB |
| 10 drives | Balanced | RAID-Z2 | Open 10x 4TB |
| 10 drives | Resilience First | RAID-Z2 | Open 10x 4TB |
| 12 drives | Capacity First | RAID 5 | Open 12x 4TB |
| 12 drives | Balanced | RAID-Z2 | Open 12x 4TB |
| 12 drives | Resilience First | RAID-Z2 | Open 12x 4TB |
Recommended next checks
- 1Confirm usable capacity target with reserve margin.
- 2Compare your selected mode against one safer and one denser alternative.
- 3Validate rebuild risk assumptions for your drive size and replacement time.
- 4Lock backup policy before final hardware purchase.
No-review procurement brief
Turn the RAID choice into verifiable hardware requirements.
This tool does not rank products or claim hands-on experience. It creates a neutral requirements brief you can use to compare exact model specifications, compatibility lists, warranty, noise, UPS support, and backup options.
Decision trust layer
How to audit this RAID recommendation before buying disks
Use the selector to narrow the RAID path, then verify the math, operational risk, and backup boundary before the purchase decision.
Capacity loop
Every suggestion should be validated with math
Use the calculator after choosing a candidate RAID level so reserve policy, drive size, and usable TB are visible before procurement.Backup boundary
RAID choice does not replace backup design
The selector focuses on availability and tolerance. Backup, restore tests, UPS planning, and replacement logistics still need separate review.Method
How this page makes decisions
Drive count The matrix starts with common NAS widths from 4 to 12 drives.
Priority Capacity, balanced, and resilience paths intentionally expose different trade-offs.
Scenario route Linked scenarios provide concrete drive-size and usable-capacity checks.
Final validation The calculator remains the final checkpoint before hardware purchase.
Pre-action checks
Pre-purchase audit
- Confirm usable TB target with reserve margin.
- Compare the selected mode against one safer and one denser alternative.
- Validate rebuild risk assumptions for drive size and replacement time.
- Lock backup policy before final hardware purchase.
- Check CMR/SMR status, UPS, and expansion path before buying disks.
This page is designed as a planning aid, not a final professional review. Product and service links may be neutral category searches until disclosed partner links are ready.
DisclosureComparison deep links
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